{"title":"Wehrli Custom Fab","description":"\u003cp\u003eBoost your diesel truck's overall power and reliability with Wehrli Custom Fab. Specializing in both performance and bulletproofing parts, Wehrli is your go-to source for Duramax, Powerstroke, and Cummins HD trucks. Their impressive lineup of cold air intakes, wiring kits, adapter flanges, bolt kits, grilles, and more, ensures you can handle big power with ease. What sets Wehrli apart is their dedication to quality and innovation, providing everything you need to maximize your diesel truck's performance and durability. \u003cbr\u003e\u003c\/p\u003e\n\u003c!----\u003e","products":[{"product_id":"wehrli-100094-twin-cp3-controller-06-16-gm-6-6l-duramax","title":"Wehrli 100094 Twin CP3 Controller | 2006-2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LBZ\/LMM\/LML","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2006–2016 6.6L Duramax engines\u003c\/li\u003e\n\u003cli\u003eSupports LBZ, LMM, and LML models\u003c\/li\u003e\n\u003cli\u003eControls dual CP3 fuel pump systems\u003c\/li\u003e\n\u003cli\u003eDesigned for high horsepower builds\u003c\/li\u003e\n\u003cli\u003eMaintains smooth and stable rail pressure\u003c\/li\u003e\n\u003cli\u003eEnables second belt-driven CP3 pump\u003c\/li\u003e\n\u003cli\u003eImproves fuel volume and system reliability\u003c\/li\u003e\n\u003cli\u003eReduces stress on single CP3 pump\u003c\/li\u003e\n\u003cli\u003eMicroprocessor controlled for precise function\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDial In Dual CP3 Control with Confidence\u003c\/h4\u003e\n\u003cp\u003eIf your Duramax build is running twin CP3 pumps, you need a controller that keeps both systems working together, not against each other. The Wehrli 100094 Twin CP3 Controller is designed for 2006 to 2016 Silverado and Sierra 2500HD and 3500HD models running LBZ, LMM, or LML engines. It provides precise microprocessor-based control that allows your second, belt-driven CP3 pump to operate in sync with the factory gear-driven unit. That extra fueling capacity is crucial for high horsepower builds, where maintaining steady rail pressure under heavy load can make or break your performance.\u003c\/p\u003e\n\u003ch4\u003eMore Fuel, Less Stress, Better Reliability\u003c\/h4\u003e\n\u003cp\u003eWhat makes this controller such an important piece of the puzzle is how it balances the workload between both pumps. Instead of overloading the stock CP3 to meet higher demand, the Wehrli unit enables your secondary pump to share the load, improving both reliability and consistency across the powerband. This means smoother fueling, less strain on components, and more confidence when you put your foot down. Whether you're building a competitive truck or just want a fueling setup that can grow with future upgrades, this controller is a must-have for making your twin CP3 system work seamlessly and safely.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2006, 2007, 2008, 2009, 2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LBZ\/LMM\/LML\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49526897312028,"sku":"WCF100094","price":251.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100094_1.jpg?v=1722363033"},{"product_id":"wehrli-100517-upper-coolant-pipe-10-18-dodge-6-7l-cummins","title":"Wehrli 100517 Upper Coolant Pipe | 2010-2018 Ram 2500\/3500 6.7L Cummins","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2010–2018 RAM 2500 and 3500 6.7L Cummins\u003c\/li\u003e\n\u003cli\u003eReplaces factory rubber upper coolant hose\u003c\/li\u003e\n\u003cli\u003eMade from high-quality aluminum construction\u003c\/li\u003e\n\u003cli\u003eCustom single-stage powder-coated finish\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM RAM radiator only\u003c\/li\u003e\n\u003cli\u003eIncludes silicone boots and T-bolt clamps\u003c\/li\u003e\n\u003cli\u003eNot for trucks with twin CP3 pump setups\u003c\/li\u003e\n\u003cli\u003eNot for 2013–2015 trucks with dual radiators\u003c\/li\u003e\n\u003cli\u003eIncreases cooling system durability and reliability\u003c\/li\u003e\n\u003cli\u003eOffers cleaner, more customized engine bay appearance\u003c\/li\u003e\n\u003cli\u003eResists heat, pressure, and long-term wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUpgrade Your Cooling System With Clean Looks And Lasting Strength\u003c\/h4\u003e\n\u003cp\u003eIf you're tired of looking at that worn-out rubber upper coolant hose in your Cummins engine bay, the Wehrli 100517 Upper Coolant Pipe is the perfect solution. This upgrade not only replaces the factory hose with a durable aluminum pipe, but also adds a custom touch with a single-stage powder-coated finish in the color of your choice. It’s a small detail that makes a big impact, both in performance and appearance. Designed to fit 2010–2018 RAM 2500 and 3500 trucks with the 6.7L Cummins, this pipe works seamlessly with the OEM RAM radiator for hassle-free installation. It includes high-quality silicone boots and T-bolt clamps, so everything you need is in the box. Whether you're building a show-ready bay or just want dependable performance while towing, this upgrade handles heat and pressure better than stock. It’s a great way to clean up your engine compartment and gain some added peace of mind at the same time.\u003c\/p\u003e\n\u003ch4\u003ePrecision Fit Cooling Performance For Long Term Reliability\u003c\/h4\u003e\n\u003cp\u003eThe Wehrli 100517 Upper Coolant Pipe is designed as a high-performance replacement for the OEM upper coolant hose on 2010–2018 RAM 2500 and 3500 trucks equipped with the 6.7L Cummins engine. Constructed from durable aluminum, this pipe improves heat resistance and long-term reliability under high-load conditions compared to traditional rubber hoses. The kit includes reinforced silicone boots and stainless steel T-bolt clamps to ensure a secure and leak-free seal, even under elevated coolant pressures. The single-stage powder-coated finish enhances corrosion resistance and provides a clean, professional appearance under the hood. This pipe is compatible only with the OEM RAM radiator and is not designed for aftermarket radiators or setups with twin CP3 pumps. Trucks from model years 2013 to 2015 equipped with dual radiators will require Wehrli model WCF100867 instead. By eliminating the risk of hose degradation and improving fit and flow, this coolant pipe supports more consistent cooling performance and a longer service life for critical engine components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Ram 2500\/3500 6.7L Cummins\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2010–2018 RAM 2500\/3500 with 6.7L Cummins engine\u003c\/li\u003e\n\u003cli\u003eReplaces OEM rubber upper coolant hose\u003c\/li\u003e\n\u003cli\u003eCompatible only with OEM RAM radiator\u003c\/li\u003e\n\u003cli\u003eNot compatible with twin CP3 pump setups\u003c\/li\u003e\n\u003cli\u003eNot compatible with 2013–2015 trucks with dual radiators\u003c\/li\u003e\n\u003cli\u003eUse WCF100867 for 2013–2015 dual radiator models\u003c\/li\u003e\n\u003cli\u003eIncludes aluminum pipe, silicone boots, and T-bolt 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With precise bolt alignment and high-temp gaskets included, this kit simplifies install while enhancing long-term durability.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003cbr\u003e1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 Dodge RAM 2500\/3500 with 5.9L or 6.7L Cummins engine (T4 turbo setup required)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e\u003cbr\u003eCovered by Wehrli’s limited lifetime warranty against manufacturing defects.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment Notes:\u003c\/strong\u003e\u003cbr\u003eSpacer is compatible with aftermarket and custom turbo setups using a T4 mounting flange. Not for use with T3 or V-band turbos. 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It replaces the factory plastic cap with a precision-machined billet aluminum piece that fits like OEM but adds a far more refined look. This isn’t just a decorative cover, it’s a full replacement cap that’s built to last. The black anodized finish gives it a clean, stealthy appearance while offering strong resistance to brake fluid, heat, and corrosion. It holds up just as well as it looks. Wehrli includes a brand-new diaphragm seal to ensure everything functions exactly as it should. Installation is quick and painless, no tools, no hassle. It’s a direct fit for 1999–2026 Silverado and Sierra HD trucks and works with all Duramax platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM 2500HD\/3500HD\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement for OEM brake reservoir cap\u003c\/li\u003e\n\u003cli\u003eThis is a complete cap, not just a decorative cover\u003c\/li\u003e\n\u003cli\u003eCNC machined from solid billet aluminum\u003c\/li\u003e\n\u003cli\u003eBlack anodized finish resists brake fluid and corrosion\u003c\/li\u003e\n\u003cli\u003eIncludes a new diaphragm seal for proper function\u003c\/li\u003e\n\u003cli\u003eInstalls in seconds with no tools required\u003c\/li\u003e\n\u003cli\u003eEnhances engine bay aesthetics with a clean, custom look\u003c\/li\u003e\n\u003cli\u003eCompatible with 1999–2026 GM 2500HD and 3500HD trucks\u003c\/li\u003e\n\u003cli\u003eFits all Duramax engine variants across those model years\u003c\/li\u003e\n\u003cli\u003eMade in the USA with high-quality materials\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025238300,"sku":"WCF100216","price":43.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100216.jpg?v=1722363048"},{"product_id":"wehrli-100215-billet-aluminum-brake-master-cylinder-cap-99-19-gm-1500-2500-3500-trucks","title":"Wehrli 100215 Billet Brake Reservoir Cap - Clear Anodized | 1999-2026 GM Silverado\/Sierra 2500HD\/3500HD","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement billet reservoir cap\u003c\/li\u003e\n\u003cli\u003eNot a cover, complete replacement cap\u003c\/li\u003e\n\u003cli\u003eCNC machined from solid billet aluminum\u003c\/li\u003e\n\u003cli\u003eClear anodized finish for clean look\u003c\/li\u003e\n\u003cli\u003eIncludes new diaphragm seal\u003c\/li\u003e\n\u003cli\u003eInstalls in seconds with no tools\u003c\/li\u003e\n\u003cli\u003eImproves engine bay appearance\u003c\/li\u003e\n\u003cli\u003eCompatible with 1999–2026 GM trucks\u003c\/li\u003e\n\u003cli\u003eFits all Duramax engine variants\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eOEM Replacement Brake Master Cylinder Cap\u003c\/h4\u003e\n\u003cp\u003eIf you're looking for a simple way to clean up the look of your engine bay, the Wehrli 100215 Billet Brake Reservoir Cap is a sleek upgrade that adds a subtle but noticeable touch of quality. Unlike basic covers that just sit on top, this is a full replacement cap, CNC machined from solid billet aluminum for a perfect fit and long-lasting durability. Finished in a clear anodized coating, it resists corrosion and holds up to brake fluid exposure without losing its clean appearance over time. It also includes a brand-new diaphragm seal to ensure proper function and pressure control. Installation is quick and easy, no tools required, and it drops right into place on any 1999–2026 Silverado or Sierra 1500, 2500HD, or 3500HD. It’s compatible with all Duramax platforms, from LB7 to L5P.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM 2500HD\/3500HD\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement for the OEM master cylinder cap\u003c\/li\u003e\n\u003cli\u003eNot a cover, this is a complete billet cap\u003c\/li\u003e\n\u003cli\u003eMachined from solid billet aluminum for strength and precision\u003c\/li\u003e\n\u003cli\u003eClear anodized finish resists brake fluid and corrosion\u003c\/li\u003e\n\u003cli\u003eIncludes a new diaphragm seal to ensure proper pressure sealing\u003c\/li\u003e\n\u003cli\u003eInstalls quickly with no tools required\u003c\/li\u003e\n\u003cli\u003eImproves under-hood appearance with a clean, high-end look\u003c\/li\u003e\n\u003cli\u003eFits 1999–2026 Silverado and Sierra 1500\/2500HD\/3500HD models\u003c\/li\u003e\n\u003cli\u003eCompatible with all Duramax engine platforms from LB7 to L5P\u003c\/li\u003e\n\u003cli\u003eMade in the USA with quality manufacturing standards\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025271068,"sku":"WCF100215","price":43.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100215_1.jpg?v=1722363048"},{"product_id":"wehrli-100189-billet-crankcase-pcv-vent-fitting-kit-04-5-10-gm-6-6l-duramax","title":"Wehrli 100189 Billet Crankcase PCV Vent Fitting Kit | 2004.5-2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2004.5-2010 6.6L Duramax LLY\/LBZ\/LMM\u003c\/li\u003e\n\u003cli\u003eReplaces weak factory plastic fittings\u003c\/li\u003e\n\u003cli\u003eIncludes two billet aluminum vent fittings\u003c\/li\u003e\n\u003cli\u003eCNC machined for a precise fit\u003c\/li\u003e\n\u003cli\u003eFeatures durable black anodized finish\u003c\/li\u003e\n\u003cli\u003eIncludes o-ring seals for leak-free performance\u003c\/li\u003e\n\u003cli\u003e5\/8\" hose barb connection included\u003c\/li\u003e\n\u003cli\u003eMade in the USA with quality materials\u003c\/li\u003e\n\u003cli\u003eInstalls easily with no tuning required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eReplace Weak Factory Fittings with Billet Strength\u003c\/h4\u003e\n\u003cp\u003eIf you’ve owned a Duramax long enough, you’ve probably heard about the weak plastic crankcase vent fittings that sit on top of the valve covers. Over time, these factory parts can crack or leak, leaving you with a mess and potential performance issues. The Wehrli 100189 Billet Crankcase PCV Vent Fitting Kit is designed to solve that problem for good. Made specifically for 2004.5-2010 Silverado and Sierra 2500HD and 3500HD models with the LLY, LBZ, or LMM Duramax, this kit replaces those fragile plastic fittings with precision-machined billet aluminum pieces that are built to last. Finished in sleek black anodizing, these fittings not only improve durability but also clean up the look under the hood.\u003c\/p\u003e\n\u003ch4\u003ePrecision Fit, Leak-Free Performance, and Easy Installation\u003c\/h4\u003e\n\u003cp\u003eEach fitting in this kit is CNC machined in the USA and includes o-ring seals to ensure a tight, leak-free connection. The 5\/8-inch hose barb makes routing your crankcase ventilation system simple, whether you’re connecting to a catch can or another vent system. Best of all, there’s no tuning required, so you can install this kit and hit the road right away. It’s a small but important upgrade that protects your engine from future headaches while adding a professional finish to your build. If you’re looking to fix a common weak spot on your Duramax with a solution you’ll never have to worry about again, this billet vent fitting kit from WCFab is the way to go.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2004.5, 2005, 2006, 2007, 2008, 2009, 2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025336604,"sku":"WCF100189","price":46.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100189_1.jpg?v=1722363044"},{"product_id":"wehrli-100024-cp3-block-off-plate-for-valley-pump-01-16-gm-6-6l-duramax","title":"Wehrli 100024 Valley CP3 Block Off Plate | 2001-2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBlocks off factory valley CP3 location\u003c\/li\u003e\n\u003cli\u003ePrecision-machined from billet aluminum\u003c\/li\u003e\n\u003cli\u003eBlack anodized for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes O-ring for a tight seal\u003c\/li\u003e\n\u003cli\u003eEngraved Wehrli logo adds a clean look\u003c\/li\u003e\n\u003cli\u003ePerfect for dual fueler or CP3 delete\u003c\/li\u003e\n\u003cli\u003eDurable and leak-resistant construction\u003c\/li\u003e\n\u003cli\u003eSimple install with factory hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWehrli Block off Plate for GM 6.6L Duramax\u003c\/h4\u003e\n\u003cp\u003eIf you're upgrading the fuel system on your 6.6L Duramax and planning to remove the factory CP3 from the engine valley, there’s one small but essential piece you don’t want to overlook—the block-off plate. The Wehrli 100024 Valley CP3 Block Off Plate is designed to cleanly and securely seal off the original CP3 location once it's been removed, whether you're running a dual fueler setup or a full CP3 delete. It's a simple component, but it plays a key role in maintaining reliability and a clean engine bay. This plate is machined from high-quality billet aluminum, giving it the strength and precision fit you’d expect from a Wehrli product. It features a durable black anodized finish that resists corrosion and looks right at home in a well-built engine bay. An engraved Wehrli logo adds a nice finishing touch without being over the top. It also includes a high-quality O-ring to ensure a leak-free seal, so once it’s installed, you won’t have to give it a second thought.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025369372,"sku":"WCF100024","price":72.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100024_1.jpg?v=1722363033"},{"product_id":"wehrli-100361-fuel-filter-housing-17-21-gm-6-6l-duramax-long-bed","title":"Wehrli 100361 Fuel Filter Housing | 2020-2024 GM 6.6L Duramax Long Bed \/ 2017-2019 Short Bed","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2017–2019 Duramax and 2020–2024 long bed trucks\u003c\/li\u003e\n\u003cli\u003eReplaces factory cartridge-style fuel filter\u003c\/li\u003e\n\u003cli\u003eIncludes Donaldson 4-micron spin-on filter\u003c\/li\u003e\n\u003cli\u003eIncreases fuel filter capacity and lifespan\u003c\/li\u003e\n\u003cli\u003eBillet aluminum base with gray anodized finish\u003c\/li\u003e\n\u003cli\u003eMaintains flow across PTC heating element\u003c\/li\u003e\n\u003cli\u003eQuick disconnect fittings for easy installation\u003c\/li\u003e\n\u003cli\u003eNo tuning or modifications required\u003c\/li\u003e\n\u003cli\u003e1\/8\" NPT port for pressure monitoring\u003c\/li\u003e\n\u003cli\u003eEngraved WCFab logo on filter base\u003c\/li\u003e\n\u003cli\u003eReplaces multiple GM part numbers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHigh-Quality Fuel Filter Housing by Wehrli\u003c\/h4\u003e\n\u003cp\u003eIf you’re running a 2017–2019 short bed or a 2020–2024 long bed Duramax and you’re ready to ditch the stock fuel filter setup, the Wehrli Fuel Filter Housing is exactly the kind of upgrade you’ll wish you had done sooner. The factory cartridge-style filter might get the job done, but it’s not known for capacity, ease of service, or long-term durability. Wehrli’s billet filter housing addresses all of that with a well-thought-out design that’s easy to install and built to last. This kit replaces the factory filter housing with a CNC-machined billet aluminum base finished in a sleek gray anodizing, complete with the WCFab logo engraved on top. It’s a clean-looking piece that mounts in the exact same location as the OEM unit and uses factory-style quick disconnect fittings, so there’s no guesswork or custom fab work involved. Everything lines up just like it should, making this a great weekend upgrade whether you’re a seasoned DIYer or just looking for a bolt-on improvement.\u003c\/p\u003e\n\u003ch4\u003eHigh-Quality Construction \u0026amp; Design\u003c\/h4\u003e\n\u003cp\u003eThe real benefit comes with the included Donaldson 4-micron spin-on filter and water separator. Compared to the stock cartridge, this setup offers increased filter capacity and better debris capture, which means more miles between changes and improved protection for your high-pressure fuel system. It’s also easier to service, no awkward caps or special tools, just a straightforward spin-on replacement when it’s time. One of the standout features is how Wehrli’s design retains the factory PTC heating element flow path, so your truck won’t lose any cold-weather capability. That’s an important detail for owners in northern climates who need reliable starts when temps drop. You also get a 1\/8\" NPT port built right into the base for fuel pressure monitoring, which is a nice bonus if you're planning to run a gauge or just want the option down the line.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2017, 2018, 2019 GM 6.6L Duramax Short and Long Bed\u003c\/li\u003e\n\u003cli\u003e2020, 2021, 2022, 2023, 2024 GM 6.6L Duramax Long Bed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplication Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIF YOU HAVE A 2023+ REGULAR CAB DUALLY, PLEASE USE PART NUMBER \u003ca rel=\"noopener\" title=\"Wehrli 100362 Fuel Filter Housing Kit | 2020-2024 Silverado\/Sierra 2500HD\/3500HD 6.6L Short Bed\" href=\"https:\/\/www.alligatorperformance.com\/products\/wehrli-100362-fuel-filter-housing-kit-17-21-gm-6-6l-duramax-short-bed?_pos=1\u0026amp;_psq=100362\u0026amp;_ss=e\u0026amp;_v=1.0\" target=\"_blank\"\u003e\u003cstrong\u003eWCF100362\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eNOT COMPATIBLE WITH 4500\/5500 MEDIUM DUTY TRUCKS EQUIPPED WITH L5D DURAMAX\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025467676,"sku":"WCF100361","price":247.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100361_20Fule_20Filter_20Housing_20Kit_2000.jpg?v=1722363072"},{"product_id":"wehrli-100648-passenger-side-up-pipe-kit-01-16-gm-6-6l-duramax","title":"Wehrli 100648 2 inch Stainless Passenger Up Pipe with Gaskets (Twin Turbo Only) | 2001-2004 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2001–2004 GM 6.6L Duramax LB7\u003c\/li\u003e\n\u003cli\u003eFor Silverado and Sierra 2500HD\/3500HD\u003c\/li\u003e\n\u003cli\u003eDesigned for twin turbo setups only\u003c\/li\u003e\n\u003cli\u003eConstructed from 11-gauge stainless steel\u003c\/li\u003e\n\u003cli\u003eIncludes heavy-duty stainless steel bellows\u003c\/li\u003e\n\u003cli\u003eReduces exhaust leaks compared to OEM pipe\u003c\/li\u003e\n\u003cli\u003eImproves turbo spool-up and throttle response\u003c\/li\u003e\n\u003cli\u003eHelps lower exhaust gas temperatures (EGTs)\u003c\/li\u003e\n\u003cli\u003eSmooth bends designed for better exhaust flow\u003c\/li\u003e\n\u003cli\u003eIncludes new gaskets for easy installation\u003c\/li\u003e\n\u003cli\u003eCompatible with factory exhaust manifold\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBuilt for Boosted Performance in Twin Turbo Setups\u003c\/h4\u003e\n\u003cp\u003eIf you're running a twin turbo system on your 2001 to 2004 GM Silverado or Sierra 2500HD\/3500HD with the 6.6L Duramax LB7, the Wehrli 100648 2-Inch Stainless Passenger Up Pipe is a must-have upgrade. The factory passenger-side up pipe is known for being lightweight and prone to cracking and leaking, especially under higher boost and heat. Wehrli’s version solves that problem with a heavy-duty 11-gauge stainless steel design, paired with reinforced stainless bellows that can handle the thermal expansion and vibration of a high-performance build. This isn’t just about durability—it’s also about flow. With smoother bends and a larger 2-inch diameter, this pipe promotes quicker turbo spool-up and helps lower exhaust gas temperatures.\u003c\/p\u003e\n\u003ch4\u003eTwin Turbo Fitment with Factory Compatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned specifically for use in twin turbo applications, this up pipe routes more cleanly than stock by avoiding the sharp, restrictive angles found in the OEM design. It’s built for flow and function, but still works with the factory exhaust manifold, making it a straightforward swap for builders looking to maximize efficiency. It’s important to note that this pipe is not compatible with conventional downpipes behind the engine due to its routing, so it’s intended strictly for properly configured twin setups. Each pipe comes complete with high-quality gaskets, so you have everything you need right out of the box. For Duramax owners chasing more power with fewer headaches, this is the kind of part that gets the job done right.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2001, 2002, 2003, 2004 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025500444,"sku":"WCF100648","price":334.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100648_202in_20Stainless_20Passenger_20Up_20Pipe_20with_20Gaskets_2000.png?v=1722363104"},{"product_id":"wehrli-100828-drivers-side-transmission-dipstick-tube-01-10-gm-6-6l-duramax","title":"Wehrli 100828 Driver Side Dip Stick Tube - Transmission | 2001-2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2001-2010 GM 6.6L Duramax trucks\u003c\/li\u003e\n\u003cli\u003eDesigned for use with Allison transmissions\u003c\/li\u003e\n\u003cli\u003eRelocates dipstick to driver side of engine bay\u003c\/li\u003e\n\u003cli\u003eIdeal for twin or large single turbo setups\u003c\/li\u003e\n\u003cli\u003eEliminates interference with turbo piping\u003c\/li\u003e\n\u003cli\u003eProvides easier dipstick access post-install\u003c\/li\u003e\n\u003cli\u003eDirect replacement for passenger-side factory tube\u003c\/li\u003e\n\u003cli\u003eSimple plug-and-play style relocation\u003c\/li\u003e\n\u003cli\u003eUses existing transmission case port\u003c\/li\u003e\n\u003cli\u003eDurable construction designed for long-term use\u003c\/li\u003e\n\u003cli\u003eClean and professional engine bay routing\u003c\/li\u003e\n\u003cli\u003eGreat for custom turbocharged applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eMake Room For Power And Access Your Trans Like A Pro\u003c\/h4\u003e\n\u003cp\u003eIf you're running a large single or twin turbo setup on your 2001-2010 Duramax, you already know the stock transmission dipstick location just gets in the way. The Wehrli Driver Side Transmission Dip Stick Tube is a simple, effective solution that frees up critical space and gives you cleaner access to your transmission fill point. This upgrade relocates the dipstick from the crowded passenger side over to the driver side, helping you avoid clearance issues with intercooler piping and turbo hardware. Whether you're building a street beast or prepping for competition, this part helps keep your engine bay clean and functional without adding hassle. Installation is straightforward, just remove the plug on the driver side of the transmission case and swap it with the passenger-side tube. The fit and finish match the quality you'd expect from Wehrli, and the relocation makes future transmission checks far easier. If you're making power, you need parts that make sense, and this tube does exactly that.\u003c\/p\u003e\n\u003ch4\u003eDesigned For Clean Routing In Custom Turbocharger Configurations\u003c\/h4\u003e\n\u003cp\u003eThe Wehrli 100828 Driver Side Dip Stick Tube is engineered specifically for 2001-2010 GM Silverado and Sierra HD trucks equipped with the 6.6L Duramax and Allison transmission. This component is designed to solve a common issue in performance applications where factory passenger-side dipstick tubes interfere with aftermarket turbocharger piping. By relocating the dipstick to the driver side, this upgrade eliminates obstructions and enhances service accessibility without requiring significant modifications. The tube installs using the existing plug location on the driver side of the transmission case, which can be swapped with the passenger-side dipstick location. It is built to OE-grade standards for fit and durability, ensuring a reliable seal and secure fitment even under the heat and stress of high-performance applications. Ideal for enthusiasts running compound turbos or larger single setups, this part offers a straightforward and effective solution for optimizing engine bay space. It is a critical detail for anyone looking to maintain both function and form in their Duramax build.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2001-2010 GM Silverado\/Sierra 2500HD\/3500HD with 6.6L Duramax\u003c\/li\u003e\n\u003cli\u003eDesigned for use with Allison transmission-equipped models\u003c\/li\u003e\n\u003cli\u003eRelocates transmission dipstick to the driver side\u003c\/li\u003e\n\u003cli\u003eIdeal for vehicles running large single or twin turbo kits\u003c\/li\u003e\n\u003cli\u003eEliminates interference with passenger-side intercooler or turbo piping\u003c\/li\u003e\n\u003cli\u003eUtilizes existing plug location on the driver side of transmission case\u003c\/li\u003e\n\u003cli\u003eRequires swapping original dipstick location with the existing case plug\u003c\/li\u003e\n\u003cli\u003eImproves engine bay layout and service accessibility\u003c\/li\u003e\n\u003cli\u003eRecommended for custom turbocharger configurations\u003c\/li\u003e\n\u003cli\u003eConstructed for reliable long-term use under high-heat conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025565980,"sku":"WCF100828","price":115.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100828_1__28766.jpg?v=1722363122"},{"product_id":"wehrli-100269-fass-lift-pump-relocation-bracket-11-16-gm-6-6l-duramax","title":"Wehlri 100269 Relocation Mount for FASS Lift Pump | 2011-2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LML","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRelocates FASS Fuel System\u003c\/li\u003e\n\u003cli\u003eMoves it underneath truck in front of fuel tank\u003c\/li\u003e\n\u003cli\u003ePremium bracket at an affordable price\u003c\/li\u003e\n\u003cli\u003eBuilt specifically for your truck\u003c\/li\u003e\n\u003cli\u003eStraightforward installation\u003c\/li\u003e\n\u003cli\u003eBacked a 1-Year Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eRelocate your FASS Fuel System Out of the Way\u003c\/h4\u003e\n\u003cp\u003eIf you're not a fan of where your FASS Fuel System is mounted on your 2011-2016 GM 6.6L Duramax equipped truck, Wehrli makes it easy than ever with their premium Relocation Mount for FASS Lift Pumps. This high-quality bracket relocates your FASS system to the underside of your truck just in front of the fuel tank, out of sight and out of mind. This cost-effective bracket was made using only premium materials to ensure your FASS fuel system won't be going anywhere even during the most extreme applications. These brackets are extremely resistant to wear and tear and will serve you for many years to come. Installation has been made simple and straightforward as Wehrli includes all of the necessary mounting instructions and hardware, making this a process you can complete at home.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2011, 2012, 2013, 2014, 2015, 2016 GM 6.6L Duramax Crew Cab Models Only\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025598748,"sku":"WCF100269","price":108.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100269_20Relocation_20Mount_20for_20FASS_20Lift_20Pump_2001.jpg?v=1722363060"},{"product_id":"100199-17-24-silverado-sierra-66l-duramax-wehrli-up-pipe-bolt-kit","title":"Wehrli 100199 Up Pipe Bolt Kit | 2017-2026 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncludes 12 washers and bolts for up-pipes\u003c\/li\u003e\n\u003cli\u003eComes with ARP lubricant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSecure Fitment of Up-Pipes with the WCFab\u003c\/h4\u003e\n\u003cp\u003eThe WCFab L5P Up Pipe Bolt Kit is an affordable and straightforward upgrade for the 2017-2026 6.6L Duramax that helps improve performance, reliability and ease of serviceability on your truck! Made of specially selected high strength ARP fasteners and matched washers, these bolts help prevent failure of the smaller and failure prone 8mm OEM fasteners employed on the 2017 and newer 6.6L Duramax engines that connect the up pipes to the exhaust manifolds and turbocharger pedestal. In short, having some of these high quality fasteners will ensure proper up-pipe maintenance and ensures longevity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits: \u003c\/strong\u003e2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Chevrolet Silverado\/GMC Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2017–2026 Chevy Silverado and GMC Sierra 6.6L L5P\u003c\/li\u003e\n\u003cli\u003eKit includes 12 high strength ARP bolts and washers\u003c\/li\u003e\n\u003cli\u003eARP assembly lube included for correct installation\u003c\/li\u003e\n\u003cli\u003eReplaces weak factory 8mm bolts that often fail\u003c\/li\u003e\n\u003cli\u003eRecommended torque spec is 24 ft-lbs\u003c\/li\u003e\n\u003cli\u003eImproves reliability of up-pipe to manifold connection\u003c\/li\u003e\n\u003cli\u003eMakes future service and maintenance easier\u003c\/li\u003e\n\u003cli\u003eNot available for sale in California\u003c\/li\u003e\n\u003cli\u003eShips quickly with straightforward installation process\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025697052,"sku":"WCF100199","price":60.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100199.jpg?v=1722344928"},{"product_id":"wehrli-100703-3-stainless-downpipe-04-5-10-gm-6-6l-duramax","title":"Wehrli 1007033 Stainless Down Pipe | 2004.5-2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LLY\/LBZ\/LMM","description":"\u003cstrong\u003e Wehrli 3\" Stainless Down Pipe Features:\u003c\/strong\u003e \u003cul\u003e \u003cli\u003e3 inch\u003c\/li\u003e \u003cli\u003eStainless Steel\u003c\/li\u003e \u003cli\u003eImproves Power Performance\u003c\/li\u003e \u003cli\u003eBoosts Horsepower\u003c\/li\u003e \u003cli\u003eAggressive Sound\u003c\/li\u003e \u003cli\u003eLowers EGTs \u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eBoost Engine Performance and Power\u003c\/h4\u003e The Wehrli 3 inch Stainless Down Pipe offers durability, aggressive sounds, and longevity to your vehicle. Enhance your ride quality with this 3 inch down pipe, as you have little to no resistance to help enhance drive performance. With the increased airflow your vehicle will improve in performance, EGTs will lower, and your engines lifespan to make sure you maintain a smooth drive quality. This down pipe provides an aggressive rumbled sound that will turn heads as you drive past.  \u003ch4\u003eDurable Material for Long Drives\u003c\/h4\u003e Keeping your vehicle updated for longer drives across country or around town with the Wehrli 3 inch stainless steel down pipe. Down pipe are helpful in removing hot air and pushing it away from your vehicle's engine. This down pipe helps create power for your engine while pushing out hot air to give cooler air the ability to access your engine. The cooler air helps give your engine the functionality to run at higher horsepower without having to worry about overheating.  \u003cp\u003e\u003cstrong\u003eVehicle Fitment: \u003c\/strong\u003e2004.5-2010 Chevrolet\/GMC 6.6L Duramax\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025795356,"sku":"WCF100703","price":247.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100703_1.jpg?v=1722363111"},{"product_id":"wehrli-100717-dry-air-filter","title":"Wehrli 100717 Dry Air Filter | 2001–2016 GM Silverado\/Sierra 6.6L Duramax LB7\/LLY\/LBZ\/LMM\/LML | 2003-2018 RAM 2500\/3500 Cummins","description":"\u003ch3 data-start=\"219\" data-end=\"235\"\u003eFeatures:\u003c\/h3\u003e\n\u003cul data-start=\"236\" data-end=\"562\"\u003e\n\u003cli data-start=\"236\" data-end=\"295\"\u003e\n\u003cp data-start=\"238\" data-end=\"295\"\u003e4” inlet dry air filter for high-performance applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"296\" data-end=\"339\"\u003e\n\u003cp data-start=\"298\" data-end=\"339\"\u003ePrecision-engineered tapered round design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"340\" data-end=\"387\"\u003e\n\u003cp data-start=\"342\" data-end=\"387\"\u003ePremium dry filter media, no oiling required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"388\" data-end=\"442\"\u003e\n\u003cp data-start=\"390\" data-end=\"442\"\u003eBuilt for closed-course\/off-road racing environments\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"443\" data-end=\"493\"\u003e\n\u003cp data-start=\"445\" data-end=\"493\"\u003eDurable construction for long-lasting filtration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"494\" data-end=\"562\"\u003e\n\u003cp data-start=\"496\" data-end=\"562\"\u003eDirect drop-in fit for WC Fab 4\" Intake and S300 Single Turbo Kits\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"564\" data-end=\"622\"\u003eHigh-Performance Filtration for Competition Builds\u003c\/h3\u003e\n\u003cp data-start=\"623\" data-end=\"1138\"\u003eThe Wehrli 100717 Dry Round Tapered Air Filter is engineered specifically for off-road race applications where maximum airflow and filtration are essential. With its\u003cstrong\u003e \u003c\/strong\u003e4” inlet and high-flow dry filter media, this filter provides a robust barrier against dust and debris without the maintenance required by oiled filters. Designed as a replacement for WC Fab 4\" intake systems and S300 turbo installs, it ensures your engine continues to operate at peak performance under the most demanding racing conditions.\u003c\/p\u003e\n\u003ch3 data-start=\"1140\" data-end=\"1176\"\u003eDurable, Hassle-Free Upgrade\u003c\/h3\u003e\n\u003cp data-start=\"1177\" data-end=\"1579\"\u003eInstallation is quick and effortless thanks to the filter’s drop-in design and precise fitment. Whether you're swapping out a clogged race filter or optimizing a high-powered diesel setup, the Wehrli 100717 gets your vehicle ready for the track with minimal downtime. Its dry filter media allows for simple cleaning and maintenance without the risk of oil contamination on sensors or intake tracts.\u003c\/p\u003e\n\u003cp data-start=\"1586\" data-end=\"1815\"\u003e\u003cstrong data-start=\"1586\" data-end=\"1598\"\u003eFitment:\u003c\/strong\u003e\u003cbr data-start=\"1598\" data-end=\"1601\"\u003e2001–2024 GM Silverado\/Sierra 2500HD \u0026amp; 3500HD 6.6L Duramax\u003cbr data-start=\"1663\" data-end=\"1666\"\u003e2003–2018 Dodge RAM 2500 \u0026amp; 3500 5.9L\/6.7L Cummins\u003cbr data-start=\"1721\" data-end=\"1724\"\u003e\u003cem data-start=\"1724\" data-end=\"1815\"\u003eDesigned for use with Wehrli Custom Fab 4\" Intake Kits and S300 Single Turbo Install Kits\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-start=\"1817\" data-end=\"1884\"\u003e\u003cstrong data-start=\"1817\" data-end=\"1830\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-start=\"1830\" data-end=\"1833\"\u003eManufacturer’s Limited Warranty, Off-Road Use Only\u003c\/p\u003e\n\u003cp data-start=\"1886\" data-end=\"1906\"\u003e\u003cstrong data-start=\"1886\" data-end=\"1904\"\u003eFitment Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1907\" data-end=\"2107\"\u003e\n\u003cli data-start=\"1907\" data-end=\"1976\"\u003e\n\u003cp data-start=\"1909\" data-end=\"1976\"\u003eRace-Only Part: Not legal for use on public roads or highways\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1977\" data-end=\"2037\"\u003e\n\u003cp data-start=\"1979\" data-end=\"2037\"\u003eIntended for closed-course or sanctioned racing only\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2038\" data-end=\"2107\"\u003e\n\u003cp data-start=\"2040\" data-end=\"2107\"\u003eNot suitable for recreational off-road use or street-legal vehicles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025860892,"sku":"WCF100717","price":72.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100717_20Wehrli_20Dry_20Round_20Tapered_20Air_20Filter00.webp?v=1722363116"},{"product_id":"wehrli-100023-relief-valve-block-off-kit-01-04-gm-6-6l-duramax-lb7","title":"Wehrli 100023 Relief Valve Block Off Kit | 2001-2004 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7","description":"\u003ch3\u003e\u003cstrong\u003eWehrli Relief Valve Block Off Kit – 100023\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFits 2001–2004 GM 2500HD \/ 3500HD with 6.6L Duramax LB7\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEliminate pressure loss and improve fuel system reliability with the Wehrli 100023 Relief Valve Block Off Kit. Designed for 2001–2004 GM trucks equipped with the 6.6L Duramax LB7, this block-off kit replaces the factory pressure relief valve (PRV) in the fuel rail, sealing the system to maintain consistent rail pressure under heavy load or tuning conditions.\u003c\/p\u003e\n\u003cp\u003eThis is a must-have upgrade for high-performance Duramax builds, especially when running larger injectors, aggressive tuning, or upgraded CP3 pumps. By removing the factory PRV, you reduce the chance of fuel pressure bleed-off that can lead to reduced power, injector issues, or drivability concerns.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eBlocks off factory fuel pressure relief valve to prevent pressure loss\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eImproves fuel rail consistency under load and during tuning\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for tuned or modified Duramax applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCNC-machined for precise fitment and leak-free seal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQuick and simple installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with factory and aftermarket fuel systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned and manufactured by Wehrli Custom Fabrication (WCFab)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003cbr\u003e2001, 2002, 2003, 2004 Chevrolet Silverado 2500HD \/ 3500HD\u003cbr\u003e2001, 2002, 2003, 2004 GMC Sierra 2500HD \/ 3500HD\u003cbr\u003eWith 6.6L Duramax LB7\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e\u003cbr\u003eCovered by Wehrli’s limited lifetime warranty. Contact WCFab for full terms and support.\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527025959196,"sku":"WCF100023","price":72.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100023_1.png?v=1722363033"},{"product_id":"wehrli-100624-2-stainless-up-pipe-kit-17-19-gm-6-6l-duramax-l5p","title":"Wehrli 100624 Stainless Up Pipe Kit with Gaskets 2\" inch | 2017-2026 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax L5P","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNo Tuning Bolt-On Installation\u003c\/li\u003e\n\u003cli\u003e2\" Stainless Up Pipe\u003c\/li\u003e\n\u003cli\u003eDecreases EGTs\u003c\/li\u003e\n\u003cli\u003eIncludes Gaskets\u003c\/li\u003e\n\u003cli\u003eNo Modifications Needed, Fits on Stock Models\u003c\/li\u003e\n\u003cli\u003eHelps prevent Air Leaks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCan Be Used For Stock Models\u003c\/h4\u003e\n\u003cp\u003eBeing able to apply your upgrades to stock models are a huge bonus when shopping for an up pipe that includes a gasket in the kit. Improve your vehicles appearance, sound, and performance by installing this up pipe kit. Providing a better power performance as well as keeping your engine in top shape, you will enhance life longevity and reach your vehicles' peak performance. With this kit you can expect a decreased in EGTs that will save on fuel economy, while the gaskets improve the secured air tight bends that could cause air leaks from happening.\u003c\/p\u003e\n\u003ch4\u003eGet Better Fuel Economy and Prevent Leaks in your Up Pipe\u003c\/h4\u003e\n\u003cp\u003eReplacing your original stock made components will help increase your vehicles, performance, power, and the best fuel economy possible. With Wehlri's up pipe kit paired with the gaskets helps improve secure air flow from having any leaks. Leaks can cause a lack of power and impact your vehicle performance from being its best. Gain that quick pickup, and better power for hauling trailers or driving up inclines that can put a damper on your vehicles' power performance. With little to no restriction you can get a consistent air flow to move smoothly to your vehicles' engine and motor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment: \u003c\/strong\u003e2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax L5P\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2017–2026 L5P Duramax with stock manifolds.\u003c\/li\u003e\n\u003cli\u003eUpgrades factory up pipes to stronger 2\" stainless.\u003c\/li\u003e\n\u003cli\u003eNo tuning or modifications are needed to install.\u003c\/li\u003e\n\u003cli\u003eIncludes gaskets for a direct bolt-on replacement.\u003c\/li\u003e\n\u003cli\u003eLowers EGTs and improves turbo spool-up.\u003c\/li\u003e\n\u003cli\u003eHelps prevent air leaks under heavy load or heat.\u003c\/li\u003e\n\u003cli\u003eWorks with factory emissions and EGR systems.\u003c\/li\u003e\n\u003cli\u003eMade in the USA with TIG-welded stainless steel.\u003c\/li\u003e\n\u003cli\u003eUses 11-gauge bellows to resist cracking and fatigue.\u003c\/li\u003e\n\u003cli\u003eNot legal for sale or use in California.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026024732,"sku":"WCF100624","price":683.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100624_20L5P_20Stainless_20Duramax_20Wehrli_20Up_20Pipe_20Kit_2000.jpg?v=1722363100"},{"product_id":"wehrli-100590-single-turbo-2-up-pipe-kit-01-16-gm-6-6l-duramax","title":"Wehrli 100590 Up Pipe Kit with Gaskets 2 inch Stainless | 2001-2004 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7","description":"\u003cstrong\u003eWehrli Up Pipe Kit w\/ Gaskets Features: \u003c\/strong\u003e \u003cul\u003e \u003cli\u003eDrivers and Passengers Side Up Pipe\u003c\/li\u003e \u003cli\u003eStainless Steel\u003c\/li\u003e \u003cli\u003eLeak Prone\u003c\/li\u003e \u003cli\u003eLightweight\u003c\/li\u003e \u003cli\u003eDecrease EGT's\u003c\/li\u003e \u003cli\u003eIncludes Gaskets\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003ePacked With Benefits For Towing Adventures\u003c\/h4\u003e The Wehlri 2 inch Up Pipe Kit helps keep your vehicle from being overheated from hauling, towing, or maintaining high speeds for longer periods of time. This up pipe kit decreases EGTs to improve gas mileage and helps keep you on the road for longer distances. With improving your gas mileage, your up pipe kit will help maintain your drive quality without giving your engine a hard time with overheating. The up pipe kit comes with gaskets to ensure you don't have a leak that could cause damage.   \u003ch4\u003eLonger Drives with Leak Prone Pipes\u003c\/h4\u003e Improve your work or everyday hauling adventures with the Wehrli Up Pipe Kit as it provides heat to flow more freely away from the engine to prevent damage form overheating. The improved upgrade is easy to install, and comes with gaskets to help prevent air leaks that could cause issues with pulling the hot air away from the engine. With the up pipe kit you gain more ease of drive quality even with heavier towing equipment and trailers without the risk of overheating your engine.  \u003cbr\u003e\u003cbr\u003e \u003cp\u003e\u003cstrong\u003eInstallation Note: \u003c\/strong\u003eThese up pipes ONLY fit with OEM exhaust manifolds or WCFab Duramax Billet Exhaust Manifolds \u003c\/p\u003e\u003cbr\u003e \u003cp\u003e\u003cstrong\u003eVehicle Fitment: \u003c\/strong\u003e2001-2004 Chevrolet\/GMC 6.6L Duramax \u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026123036,"sku":"WCF100590","price":619.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/Wehrli_202inch_20stainles_20single_20turbo_20up_20pipe_2000.webp?v=1722363096"},{"product_id":"wehrli-100093-twin-cp3-controller-01-05-gm-6-6l-duramax-lb7-lly","title":"Wehrli 100093 Twin CP3 Controller | 2001-2005 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7\/LLY","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2001–2005 Duramax LB7 and LLY engines\u003c\/li\u003e\n\u003cli\u003eControls dual CP3 pump fuel systems\u003c\/li\u003e\n\u003cli\u003eSupports high-horsepower fuel requirements\u003c\/li\u003e\n\u003cli\u003eMaintains consistent rail pressure under load\u003c\/li\u003e\n\u003cli\u003eReduces stress on factory CP3 pump\u003c\/li\u003e\n\u003cli\u003eEnables second belt-driven CP3 operation\u003c\/li\u003e\n\u003cli\u003eImproves fuel system reliability and flow\u003c\/li\u003e\n\u003cli\u003eMicroprocessor controlled for accurate performance\u003c\/li\u003e\n\u003cli\u003eEssential for twin CP3 setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFuel Delivery that Matches the Muscle Under the Hood\u003c\/h4\u003e\n\u003cp\u003eWhen you're building serious power in your 2001 to 2005 LB7 or LLY Duramax, one CP3 pump often isn't enough to keep up with the fuel demands. That's where the Wehrli 100093 Twin CP3 Controller steps in. Designed specifically for high-output builds, this controller makes it possible to run a second, belt-driven CP3 alongside your factory gear-driven unit. It’s more than just a wiring harness—it uses precise microprocessor control to ensure both pumps work together in sync, maintaining consistent rail pressure no matter how hard you're pushing the truck. If you’re running large injectors, an aggressive tune, or just demanding more from your setup than stock components were designed to handle, this controller makes sure your fueling system keeps pace.\u003c\/p\u003e\n\u003ch4\u003eBalanced Load, Improved Reliability, and Seamless Integration\u003c\/h4\u003e\n\u003cp\u003eAdding a second pump isn’t just about making more power—it’s also about protecting the investment you’ve already made. With this controller, fuel volume increases dramatically without putting all the stress on a single CP3. That means smoother operation at higher RPMs, better throttle response, and a noticeable improvement in drivability under load. It’s an essential upgrade for any twin CP3 setup, and Wehrli builds it with reliability and simplicity in mind. Installation is straightforward, and once installed, it works quietly in the background to keep your high-pressure fuel system operating exactly as it should. Whether you're chasing big horsepower or just want a more robust fueling solution, this controller is a key piece to doing it right.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7\/LLY\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026188572,"sku":"WCF100093","price":251.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100093_1.jpg?v=1722363033"},{"product_id":"wehrli-100119-3-stainless-downpipe-01-04-gm-6-6l-duramax-lb7","title":"Wehrli 100119 3 inch Down-Pipe | 2001-2004 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7","description":"\u003cstrong\u003e2001-2004 GM 6.6L Duramax 2500HD \/ 3500HD Wehrli 3\" Down-Pipe Features:\u003c\/strong\u003e \u003cul\u003e \u003cli\u003e3\" down-pipe\u003c\/li\u003e \u003cli\u003eHeat wrapped\u003c\/li\u003e \u003cli\u003eHigh-temperature coating\u003c\/li\u003e \u003cli\u003eBolt-on upgrade\u003c\/li\u003e \u003cli\u003eNo tuning required\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eThe 2001-2004 GM 6.6L Duramax 2500HD \/ 3500HD Wehrli 3\" Down-Pipe Offers More Efficient Airflow\u003c\/h4\u003e To ensure you are squeezing all of the power and performance gains out of your 2001-2004 GM 6.6L Duramax 2500HD \/ 3500HD, you are going to want to replace your weak factory turbocharger down-pipe with the 2001-2004 GM 6.6L Duramax 2500HD \/ 3500HD Wehrli 3\" Down-Pipe. It immediately makes airflow more efficient by being less restrictive to let you unlock every last bit of horsepower and torque from your 6.6L diesel engine. Installation of this down-pipe makes this a must have for your build. It is a simple bolt-on installation that requires no additional tuning modifications.   \u003cp\u003e\u003c\/p\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2001, 2002, 2003, 2004 GM 6.6L Duramax 2500HD \/ 3500HD","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026221340,"sku":"WCF100119","price":237.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100119_2001-04_20GM_206_6L_20Duramax_20Wehrli_203in_20Down-Pipe00.webp?v=1722363040"},{"product_id":"100240-01-16-gm-6-6l-duramax-wehrli-up-pipe-bolt-kit","title":"Wehrli 100240 Up Pipe Bolt Kit | 2001-2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePremium ARP up pipe bolt kit\u003c\/li\u003e\n\u003cli\u003e6 washers and bolts for installing 1 up pipe\u003c\/li\u003e\n\u003cli\u003eIncludes ARP lube\u003c\/li\u003e\n\u003cli\u003eA pair of up pipes requires 2 sets\u003c\/li\u003e\n\u003cli\u003eHigh-strength components\u003c\/li\u003e\n\u003cli\u003eStraightforward install\u003c\/li\u003e\n\u003cli\u003eTorque 54 ft lbs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eOffers Premium ARP Fasteners to Connect Up Pipes\u003c\/h4\u003e\n\u003cp\u003eThe factory fasteners and washers on your truck's up pipes that connect to the exhaust manifolds and turbocharger pedestal are prone to wearing over time, so we recommend replacing them with the stronger Wehrli Up-Pipe Bolt Kit for your 2001-2016 GM 6.6L Duramax truck. These fasteners and washers were specifically engineered to provide more strength and durability over stock, ensuring your up-pipes remain in place even during the most extreme applications. This kit is a simple, cost effective upgrade for peace of mind and easy serviceability for both stock and modified trucks.\u003c\/p\u003e\n\u003ch4\u003eImprove Torque with this Easy Installation\u003c\/h4\u003e\n\u003cp\u003eWith a seamless straightforward installation you can spend less time installing and more time hitting the roads getting the feel to your new up pipe. With the improving airflow this bolt kit allows you airflow to be safe and secure without stress of the up pipe becoming loose to decrease ride quality. With the bolt kit to help lock your up pipe in place you will enjoy the immense torque pickup speeds that will be beneficial for merging on the highway.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM 6.6L Duramax 2500HD\/3500HD\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026286876,"sku":"WCF100240","price":36.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100240_2001-16_20GM_206_6L_20Duramax_20Wehrli_20Up_20Pipe_20Bolt_20Kit00.webp?v=1722344928"},{"product_id":"wehrli-100229-rail-fitting-01-16-gm-6-6l-duramax","title":"Wehrli 100229 High Flow Rail Fitting - Short | 2001-2005 \u0026 11-16 GM Silverado\/Sierra 2500HD\/3500HD Duramax 6.6L Duramax","description":"\u003cp\u003eShort Stainless Rail Fitting for LB7 \u0026amp; LLY or LML Fuel Rails. 1\/8\" ID for increase fuel flow.\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026352412,"sku":"WCF100229","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100229.jpg?v=1722363048"},{"product_id":"wehrli-100113-rear-differential-cover-aam-11-5-axle","title":"Wehrli 100113 Rear AAM 11.5 Differential Cover | 2001-2019 GM 6.6L Duramax 2500HD\/3500HD \u0026 2003-2019 Dodge Ram 5.9L\/6.7L Cummins","description":"\u003cp data-start=\"201\" data-end=\"214\" class=\"\"\u003e\u003cstrong data-start=\"201\" data-end=\"214\"\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"216\" data-end=\"553\"\u003e\n\u003cli data-start=\"216\" data-end=\"305\" class=\"\"\u003e\n\u003cp data-start=\"218\" data-end=\"305\" class=\"\"\u003ePrecision-fabricated aluminum construction for superior strength and heat dissipation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"306\" data-end=\"357\" class=\"\"\u003e\n\u003cp data-start=\"308\" data-end=\"357\" class=\"\"\u003eDirect-fit replacement for AAM 11.5\" rear axles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"358\" data-end=\"418\" class=\"\"\u003e\n\u003cp data-start=\"360\" data-end=\"418\" class=\"\"\u003eIncludes stainless steel mounting hardware and fill plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"419\" data-end=\"490\" class=\"\"\u003e\n\u003cp data-start=\"421\" data-end=\"490\" class=\"\"\u003eCustom powder coat finish options available for a personalized look\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"491\" data-end=\"553\" class=\"\"\u003e\n\u003cp data-start=\"493\" data-end=\"553\" class=\"\"\u003eBuilt for durability in heavy-duty and off-road conditions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"555\" data-end=\"608\" class=\"\"\u003e\u003cstrong data-start=\"555\" data-end=\"608\"\u003eUpgrade Your Rear Axle with Performance and Style\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"610\" data-end=\"1064\" class=\"\"\u003eThe Wehrli WCF100113 Rear Differential Cover is a premium upgrade for 2001–2019 GM 2500HD\/3500HD Duramax and 2003–2019 Dodge Ram 2500\/3500 trucks with 5.9L or 6.7L Cummins engines. Designed to fit AAM 11.5\" rear axles, this fabricated aluminum cover not only enhances the look of your undercarriage but also improves heat dissipation and structural integrity under load. It’s ideal for tow rigs, off-road builds, and high-performance diesel applications.\u003c\/p\u003e\n\u003cp data-start=\"1066\" data-end=\"1100\" class=\"\"\u003e\u003cstrong data-start=\"1066\" data-end=\"1100\"\u003eCustom Look with Real Function\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1102\" data-end=\"1469\" class=\"\"\u003eThis cover is more than just aesthetics, its high-strength aluminum build reduces gear oil temps while withstanding the rigors of towing and aggressive driving. Whether you're hauling heavy loads or upgrading your show truck, this cover gives you the performance benefits and custom styling you want. Available in a range of powder coat finishes to match your build.\u003c\/p\u003e\n\u003cp data-start=\"1471\" data-end=\"1492\" class=\"\"\u003e\u003cstrong data-start=\"1471\" data-end=\"1492\"\u003ePackage Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1494\" data-end=\"1597\"\u003e\n\u003cli data-start=\"1494\" data-end=\"1547\" class=\"\"\u003e\n\u003cp data-start=\"1496\" data-end=\"1547\" class=\"\"\u003e(1) Wehrli fabricated aluminum differential cover\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1548\" data-end=\"1585\" class=\"\"\u003e\n\u003cp data-start=\"1550\" data-end=\"1585\" class=\"\"\u003eStainless steel mounting hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1586\" data-end=\"1597\" class=\"\"\u003e\n\u003cp data-start=\"1588\" data-end=\"1597\" class=\"\"\u003eFill plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1599\" data-end=\"1618\" class=\"\"\u003e\u003cstrong data-start=\"1599\" data-end=\"1618\"\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1620\" data-end=\"1804\"\u003e\n\u003cli data-start=\"1620\" data-end=\"1653\" class=\"\"\u003e\n\u003cp data-start=\"1622\" data-end=\"1653\" class=\"\"\u003eMaterial: Fabricated aluminum\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1654\" data-end=\"1692\" class=\"\"\u003e\n\u003cp data-start=\"1656\" data-end=\"1692\" class=\"\"\u003eAxle Compatibility: AAM 11.5\" rear\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1693\" data-end=\"1745\" class=\"\"\u003e\n\u003cp data-start=\"1695\" data-end=\"1745\" class=\"\"\u003eFinish: Custom powder coat (varies by selection)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1746\" data-end=\"1775\" class=\"\"\u003e\n\u003cp data-start=\"1748\" data-end=\"1775\" class=\"\"\u003eHardware: Stainless steel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1776\" data-end=\"1804\" class=\"\"\u003e\n\u003cp data-start=\"1778\" data-end=\"1804\" class=\"\"\u003eDrain\/Fill Ports: Included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1806\" data-end=\"1824\" class=\"\"\u003e\u003cstrong data-start=\"1806\" data-end=\"1824\"\u003eFitment Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1826\" data-end=\"2065\"\u003e\n\u003cli data-start=\"1826\" data-end=\"1879\" class=\"\"\u003e\n\u003cp data-start=\"1828\" data-end=\"1879\" class=\"\"\u003e2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 GM 2500HD\/3500HD with 6.6L Duramax\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1880\" data-end=\"1944\" class=\"\"\u003e\n\u003cp data-start=\"1882\" data-end=\"1944\" class=\"\"\u003e2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Dodge Ram 2500\/3500 with 5.9L\/6.7L Cummins\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1945\" data-end=\"2003\" class=\"\"\u003e\n\u003cp data-start=\"1947\" data-end=\"2003\" class=\"\"\u003eFor use with trucks equipped with AAM 11.5\" rear axles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2004\" data-end=\"2065\" class=\"\"\u003e\n\u003cp data-start=\"2006\" data-end=\"2065\" class=\"\"\u003eMay not fit trucks with aftermarket rear axle conversions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Gloss Black","offer_id":49527026417948,"sku":"WCF100113-GB","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Bengal Blue","offer_id":51294516248860,"sku":"WCF100113-BB","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Fine Texture Black","offer_id":51294516281628,"sku":"WCF100113-FTB","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Grape Frost","offer_id":51294516314396,"sku":"WCF100113-GF","price":387.03,"currency_code":"USD","in_stock":true},{"title":"Gun Metal","offer_id":51294516347164,"sku":"WCF100113-GM","price":377.33,"currency_code":"USD","in_stock":true},{"title":"WCFab Grey","offer_id":51294516379932,"sku":"WCF100113-GRY","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Gloss White","offer_id":51294516412700,"sku":"WCF100113-GW","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Illusion Blueberry","offer_id":51294516445468,"sku":"WCF100113-IBB","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Illusion Purple","offer_id":51294516478236,"sku":"WCF100113-IP","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Kiwi Green","offer_id":51294516511004,"sku":"WCF100113-KIWI","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Mica Grey","offer_id":51294516543772,"sku":"WCF100113-MICG","price":343.38,"currency_code":"USD","in_stock":true},{"title":"Orange Frost","offer_id":51294516576540,"sku":"WCF100113-OF","price":387.03,"currency_code":"USD","in_stock":true},{"title":"WCFab Red","offer_id":51294516609308,"sku":"WCF100113-RED","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Sparkle Bomber Orange","offer_id":51294516674844,"sku":"WCF100113-SBO","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Sparkle Copper","offer_id":51294516707612,"sku":"WCF100113-SC","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Semi-Gloss Black","offer_id":51294516740380,"sku":"WCF100113-SGB","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Sparkle Granny Smith","offer_id":51294516773148,"sku":"WCF100113-SGS","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Shocker Yellow","offer_id":51294516805916,"sku":"WCF100113-SY","price":387.03,"currency_code":"USD","in_stock":true},{"title":"Blueberry Frost","offer_id":51294516838684,"sku":"WCF100113-BBF","price":387.03,"currency_code":"USD","in_stock":true},{"title":"Bronze Chrome","offer_id":51294516871452,"sku":"WCF100113-BC","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Bengal Grey","offer_id":51294516904220,"sku":"WCF100113-BG","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Bengal Red","offer_id":51294516936988,"sku":"WCF100113-BR","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Brizzle Blue","offer_id":51294516969756,"sku":"WCF100113-BRZ","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Bengal Silver","offer_id":51294517002524,"sku":"WCF100113-BS","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Cat Yellow","offer_id":51294517035292,"sku":"WCF100113-CAT","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Candy Blue","offer_id":51294517068060,"sku":"WCF100113-CB","price":387.03,"currency_code":"USD","in_stock":true},{"title":"Cherry 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The cartridge-style setup isn’t exactly known for its convenience or filter capacity, and it can make maintenance more frustrating than it needs to be. That’s where the Wehrli Fuel Filter Housing Kit steps in. Designed specifically for short bed Silverado and Sierra 2500HD\/3500HD trucks, this kit gives you a clean and reliable way to upgrade to a spin-on canister filter, without overcomplicating the install. Wehrli uses a CNC-machined, billet aluminum filter base that's not only stronger than the factory plastic unit, but also finished in a sharp gray anodizing with an engraved WCFab logo for that custom touch under the hood. It's a direct bolt-on replacement, using the same mounting location and OEM-style quick disconnect fittings, so there’s no custom fabrication or extra plumbing required. You can install it in your driveway with basic tools and a little patience.\u003c\/p\u003e\n\u003ch4\u003eIncludes Spin-On Fuel Filter and Water Separator\u003c\/h4\u003e\n\u003cp\u003eOne of the most useful upgrades here is the switch to a Donaldson 4-micron spin-on fuel filter and water separator, which comes included in the kit. This filter provides better capacity and filtration than the stock setup, allowing you to go longer between changes without sacrificing fuel system protection. Whether you’re racking up miles on the highway or towing heavy loads, that extra filtration goes a long way in protecting your injectors and fuel pump. Cold weather performance wasn’t overlooked either. The kit is engineered to maintain fuel flow across the factory PTC heating element, so you won’t run into cold start issues when the temperature drops. It’s compatible with completely stock trucks and doesn’t require any tuning or additional modifications to work. Plus, if you're running a fuel pressure sensor, Wehrli includes a 1\/8\" NPT port for easy integration, another small detail that makes a big difference for anyone keeping an eye on their fuel system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax Short Bed\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment Note:\u003c\/strong\u003e NOT COMPATIBLE WITH 4500\/5500 MEDIUM DUTY TRUCKS EQUIPPED WITH L5D DURAMAX\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReference:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplaces GM Part #'s: 13543066, 13539109\u003c\/li\u003e\n\u003cli\u003eProtected under US Patent No. D978,917\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026516252,"sku":"WCF100362","price":247.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100362_20Fuel_20Filter_20Housing_20Kit_2000.jpg?v=1722363074"},{"product_id":"wehrli-100265-lift-pump-relocation-bracket-01-10-gm-6-6l-duramax","title":"Wehrli 100265 Relocation Mount For FASS Lift Pump | 2001-2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cstrong\u003eGM 6.6L Duramax Wehrli Relocation Mount for FASS Lift Pump Features:\u003c\/strong\u003e \u003cul\u003e \u003cli\u003eRelocates FASS Fuel System\u003c\/li\u003e \u003cli\u003eGrade 8 Hardware\u003c\/li\u003e \u003cli\u003eZinc Primer \u0026amp; Semi Glass Black Powder Coat Finish\u003c\/li\u003e \u003cli\u003eBuilt Specifically for your Truck\u003c\/li\u003e \u003cli\u003eStraightforward Installation\u003c\/li\u003e \u003cli\u003e1-Year Limited Warranty\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eRelocate your FASS Fuel System Out of the Way\u003c\/h4\u003e If you're not a fan of where your FASS Fuel System is mounted on your 2001-2010 GM 6.6L Duramax equipped truck, Wehrli makes it easy than ever with their premium Relocation Mount for FASS Lift Pumps. This high-quality bracket relocates your FASS system to the underside of your truck just in front of the fuel tank, out of sight and out of mind. This cost-effective bracket was made using only premium materials to ensure your FASS fuel system won't be going anywhere even during the most extreme applications.   \u003ch4\u003eInstalls Easily and Gives Tires More Room\u003c\/h4\u003e These brackets are extremely resistant to wear and tear and will serve you for many years to come. Installation has been made simple and straightforward as Wehrli includes all of the necessary mounting instructions and hardware, making this a process you can complete at home. With the relocation mount and the FASS lift pump gives more space for multiple sizes of tires to be installed on to your truck without the damage from constant rubbing. Giving access to wider and thicker tires your off-road adventures will become more accessible to trek while giving you the much needed weight distribution among all of your tires.  \u003cp\u003e\u003cstrong\u003eVehicle Fitment: \u003c\/strong\u003e 2001-2010 Chevrolet\/GMC 2500\/3500 6.6L\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026483484,"sku":"WCF100265","price":98.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100265_20Duramax_20Wehrli_20Relocation_20Mount_20for_20FASS_20Lift_20Pump_2000.png?v=1722363059"},{"product_id":"wehrli-100652-driver-side-up-pipe-kit-01-16-gm-6-6l-duramax","title":"Wehrli 100652 2 inch Stainless Driver Up Pipe with Gaskets (Single or Twin Turbo) | 2001-2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \n\n\u003cul\u003e\n  \u003cli\u003eReplaces weak factory driver-side up pipe\u003c\/li\u003e\n  \u003cli\u003eMade from heavy-duty 11-gauge stainless steel\u003c\/li\u003e\n  \u003cli\u003eIncludes high-strength stainless steel bellows\u003c\/li\u003e\n  \u003cli\u003eWon’t crack or leak like OEM pipes\u003c\/li\u003e\n  \u003cli\u003eImproves turbo spool-up and throttle response\u003c\/li\u003e\n  \u003cli\u003eHelps lower exhaust gas temperatures (EGTs)\u003c\/li\u003e\n  \u003cli\u003eWorks with single or compound turbo setups\u003c\/li\u003e\n  \u003cli\u003eCompatible with factory exhaust manifold only\u003c\/li\u003e\n  \u003cli\u003eDesigned for 2001–2016 6.6L Duramax engines\u003c\/li\u003e\n  \u003cli\u003eIncludes high-quality gaskets for installation\u003c\/li\u003e\n  \u003cli\u003eBuilt for long-term durability and performance\u003c\/li\u003e\n  \u003cli\u003eGreat for towing, racing, or daily use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e Say Goodbye To Leaks And Hello To Boost \u003c\/h4\u003e \n\n\u003cp\u003e If you’re tired of dealing with the cracking and leaking that comes with your factory driver-side up pipe, it’s time to bolt in something that’s built to last. The Wehrli 100652 2-Inch Stainless Driver Up Pipe is designed to replace the failure-prone OEM pipe on your 2001–2016 6.6L Duramax with a heavy-duty solution that won’t let you down. Crafted from 11-gauge stainless steel, this pipe is made to handle the heat and pressure of hard-working or high-performance diesel setups. It even features a reinforced stainless steel bellow that won’t crack under load like the thin stock units. You’ll notice quicker turbo spool-up, lower EGTs, and more consistent performance whether you’re towing heavy or hammering down on the highway. This pipe is built to work with any turbo setup, single or compound, as long as you're running the factory exhaust manifold. It’s a rock-solid upgrade that gives you more reliability, more flow, and a lot more peace of mind. \u003c\/p\u003e \n\n\u003ch4\u003e Built For Flow Sealing Strength And Compatibility \u003c\/h4\u003e \n\n\u003cp\u003e The Wehrli 100652 Driver-Side Up Pipe is a precision-engineered replacement designed for 2001–2016 GM Silverado and Sierra 2500HD and 3500HD trucks equipped with the 6.6L Duramax. Constructed from thick 11-gauge stainless steel, this pipe offers a significant durability upgrade over the OEM component, which is known to develop leaks and cracks over time. The unit features a high-grade stainless steel bellow that allows for flexibility and thermal expansion without compromising structural integrity. It is compatible with both single and compound turbocharger setups, as long as the factory exhaust manifold is retained. This ensures fitment across a wide range of modified or performance builds without sacrificing reliability. The pipe also helps improve turbo spool characteristics and reduce exhaust gas temperatures by eliminating restrictions and ensuring a leak-free seal. Included gaskets make installation straightforward and help ensure long-lasting performance. 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High Temp coated for protection that can harm your vehicles other functionality. For use with factory turbo or factory style drop in the turbo. With this down pipe you can only use it for off-road adventures, for the the rumbles it gives. With the high heat resistance this makes it perfect for handling high and harmful emission gases or fumes that can damage vehicle parts or others.  \u003ch4\u003eGet More Fuel Efficiency with Consistent Air Flow\u003c\/h4\u003e Installing the Wehrli 3\" down pipe will create a powerful performance with a drop in installation.  Made for off-road use this downpipe will allow you to travel long distances or for longer time periods without you worrying about overheating your vehicles engine and nearby components. The consistent airflow allows for hot air to be removed more easily through the down pipe to help improve your fuel economy while on your off-road adventures. The blakc ceramic coating gives an extra line of heat defense that will keep your engine life form becoming damaged due to excessive heat.   \u003cp\u003e\u003cstrong\u003eVehicle Fitment: \u003c\/strong\u003e2004.5-2010 Chevrolet\/GMC 2500\/3500\/4500 6.6L V8 \u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026712860,"sku":"WCF100120","price":194.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100120_203in_20Down_20Pipe_2000.jpg?v=1722363040"},{"product_id":"wehrli-100719-air-filter","title":"Wehrli 100719 5\" inch Inlet Dry Air Filter | 2004-2024 Ram 5.9L\/6.7L Cummins \u0026 2001-2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor WCFab Twin Turbo \u0026amp; S400 Single Install Kits\u003c\/li\u003e\n\u003cli\u003eDry Air Filter 5\" Inlet\u003c\/li\u003e\n\u003cli\u003eFilters more consistently over stock\u003c\/li\u003e\n\u003cli\u003eMeasures 11” long, 5” diameter at the inlet, and 7” at the base\u003c\/li\u003e\n\u003cli\u003eStraightforward installation\u003c\/li\u003e\n\u003cli\u003eUniversal Fitment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePremium Replacement Air Filter for WCFab Kits\u003c\/h4\u003e\n\u003cp\u003eFor those who demand the highest quality replacements that offer supreme levels performance, look no further than the Wehrli 5\" Inlet Dry Air Filter! This premium replacement air filter for any WC Fab kits you may have installed on your rig offers up impressive quality, performance, and reliability over stock. Designed for a perfect fitment and hassle-free installation, this high-quality replacement will get you back on the road faster and easier than ever.\u003c\/p\u003e\n\u003ch4\u003eInstallation Info\u003c\/h4\u003e\n\u003cp\u003eCrafted for a direct replacement of your factory unit, the Wehrli 5\" Inlet Dry Air Filter can be installed using the included hardware and instructions, making for a simple and straightforward job you can complete at home. With Wehrli on your side, you can you take your truck to new heights and experience consistent performance each time you get behind the wheel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e2004-2024 Dodge RAM 2500\/3500 5.9L\/6.7L Cummins\u003c\/p\u003e\n\u003cp\u003e2001-2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRace Only Product:\u003c\/strong\u003e This is a Race Only product that is to be used solely for competition. It cannot be used on vehicles that are operated on public streets, roads or highways. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, could be in violation of local, state and federal laws.\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026745628,"sku":"WCF100719","price":72.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/F221304638.jpg?v=1744391664"},{"product_id":"wehrli-100654-passenger-side-up-pipe-kit-01-16-gm-6-6l-duramax","title":"Wehrli 100654 2 inch Stainless Passenger Up Pipe with Gaskets (Single Turbo) | 2001-2004 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2001–2004 GM 6.6L Duramax LB7\u003c\/li\u003e\n\u003cli\u003eFor Silverado and Sierra 2500HD\/3500HD\u003c\/li\u003e\n\u003cli\u003eDesigned for single turbo applications\u003c\/li\u003e\n\u003cli\u003eClearances a conventional downpipe\u003c\/li\u003e\n\u003cli\u003eCompatible with factory exhaust manifold\u003c\/li\u003e\n\u003cli\u003eConstructed from 11-gauge stainless steel\u003c\/li\u003e\n\u003cli\u003eHeavy-duty stainless bellow resists cracking\u003c\/li\u003e\n\u003cli\u003eImproves turbo spool-up and throttle response\u003c\/li\u003e\n\u003cli\u003eHelps reduce exhaust gas temperatures\u003c\/li\u003e\n\u003cli\u003eCan be used with twin turbo setups\u003c\/li\u003e\n\u003cli\u003eIncludes high-quality gaskets for installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBuilt for Strength Where It Matters Most\u003c\/h4\u003e\n\u003cp\u003eWhen you're chasing reliability and performance in your LB7 Duramax, the stock up pipe can quickly become a weak link. The Wehrli 100654 2-inch Stainless Passenger Up Pipe is designed to fix that. This upgraded unit replaces the thin, failure-prone factory pipe with a robust 11-gauge stainless steel build that’s made to handle the heat and pressure of real-world driving. Whether you're towing heavy loads or running performance upgrades, this pipe helps improve turbo spool-up and reduce exhaust gas temperatures—something any diesel owner can appreciate when trying to keep temps in check under load.\u003c\/p\u003e\n\u003ch4\u003eDesigned for Real-World Fit and Function\u003c\/h4\u003e\n\u003cp\u003eThis version is specifically crafted for single turbo setups and features a bend profile that provides proper clearance for a conventional downpipe, making installation smoother and fitment more precise. The HD stainless bellow is built to flex without cracking, even under harsh conditions. It's also compatible with compound or twin turbo configurations, giving you some flexibility if your setup changes down the road. Gaskets are included to make this a ready-to-install solution right out of the box, so you can get back on the road with confidence and peace of mind.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2001, 2002, 2003, 2004 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026876700,"sku":"WCF100654","price":334.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100654_20Passenger_20Up_20Pipe_20with_20Gaskets_2000.png?v=1722363108"},{"product_id":"wehrli-100230-rail-fitting-04-5-10-gm-6-6l-duramax","title":"Wehrli 100230 Rail Fitting | 2004.5-2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cspan style=\"font-size: small;\"\u003eLong Stainless Rail Fitting for LLY, LBZ, \u0026amp; LMM Driver side rail rear port. 1\/8\" ID for increased fuel flow.\u003c\/span\u003e\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527026975004,"sku":"WCF100230","price":61.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100230_20RAil_20FITTING_2000.jpg?v=1722363049"},{"product_id":"wehrli-100589-twin-turbo-2-up-pipe-kit-01-16-gm-6-6l-duramax","title":"Wehrli 100589 Stainless Up Pipe Kit with Gaskets (Twin Turbo), 2in, | 2001-2004 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2001–2004 6.6L Duramax LB7 engines\u003c\/li\u003e\n\u003cli\u003eDesigned for twin turbo applications\u003c\/li\u003e\n\u003cli\u003eReplaces leak-prone 1 5\/8 inch factory pipes\u003c\/li\u003e\n\u003cli\u003eConstructed from heavy-duty 11-gauge stainless\u003c\/li\u003e\n\u003cli\u003eFeatures high-strength stainless steel bellows\u003c\/li\u003e\n\u003cli\u003eImproves turbo spool and throttle response\u003c\/li\u003e\n\u003cli\u003eHelps reduce exhaust gas temperatures (EGTs)\u003c\/li\u003e\n\u003cli\u003eIncludes gaskets for a complete install\u003c\/li\u003e\n\u003cli\u003eNot compatible with conventional downpipes\u003c\/li\u003e\n\u003cli\u003eWorks with factory exhaust manifolds\u003c\/li\u003e\n\u003cli\u003e2-inch diameter for increased exhaust flow\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDitch the Leaks and Unlock Better Flow\u003c\/h4\u003e\n\u003cp\u003eIf you're running a twin turbo setup on your 2001 to 2004 LB7 Duramax, the last thing you want is a restrictive or failure-prone up pipe choking performance. The Wehrli 100589 Stainless Up Pipe Kit is built to replace the weak 1 5\/8-inch factory pipes with heavy-duty 2-inch tubing that’s designed to handle high heat and pressure without flinching. These pipes are made from thick 11-gauge stainless steel and come with robust stainless bellows that resist cracking and leaking—one of the most common issues with the stock design. With a stronger, smoother path for exhaust gases, you'll see quicker turbo spool-up and cooler EGTs, both of which are major wins for power and reliability.\u003c\/p\u003e\n\u003ch4\u003eBuilt for Boost, Not for Compromise\u003c\/h4\u003e\n\u003cp\u003eThis kit is tailored specifically for twin turbo applications using the factory exhaust manifolds. The design is nearly symmetrical on both sides and eliminates the factory-style indents that normally allow space for a rear-mounted downpipe. That means you get more consistent flow and fewer bottlenecks in the exhaust path, but it also means these pipes won’t work with a conventional downpipe routed behind the engine. Installation is made easier with the included gaskets, and once everything is bolted up, you're left with a strong, leak-free connection that can handle serious boost and temperature without breaking a sweat. Whether you're finishing a custom twin turbo build or upgrading a worn-out setup, this up pipe kit is the kind of upgrade that pays off every time you get into the throttle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2001, 2002, 2003, 2004 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027040540,"sku":"WCF100589","price":619.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100589_20TWIN_20TURBO_20PIPE_20KIT_2000.jpg?v=1722363096"},{"product_id":"wehrli-universal-air-filter-cover","title":"Wehrli 100728 Air Filter Cover | Universal","description":"\u003ch3 data-start=\"130\" data-end=\"146\"\u003eFeatures\u003c\/h3\u003e\n\u003cul data-start=\"147\" data-end=\"490\"\u003e\n\u003cli data-start=\"147\" data-end=\"216\"\u003e\n\u003cp data-start=\"149\" data-end=\"216\"\u003eUniversal-fit air filter cover for Wehrli intakes and turbo filters\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"217\" data-end=\"271\"\u003e\n\u003cp data-start=\"219\" data-end=\"271\"\u003eShields filter from dust, debris, and light moisture\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"272\" data-end=\"339\"\u003e\n\u003cp data-start=\"274\" data-end=\"339\"\u003e\u003cstrong data-start=\"274\" data-end=\"301\"\u003eWater-repellent barrier\u003c\/strong\u003e resists puddles and splash saturation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"340\" data-end=\"398\"\u003e\n\u003cp data-start=\"342\" data-end=\"398\"\u003eHelps \u003cstrong data-start=\"348\" data-end=\"367\"\u003eextend the life\u003c\/strong\u003e of your performance air filter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"399\" data-end=\"437\"\u003e\n\u003cp data-start=\"401\" data-end=\"437\"\u003eQuick and \u003cstrong data-start=\"411\" data-end=\"437\"\u003etool-free installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"438\" data-end=\"490\"\u003e\n\u003cp data-start=\"440\" data-end=\"490\"\u003eIdeal for off-road, racing, and dusty environments\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"492\" data-end=\"546\"\u003eDurable Protection for Your Performance Filter\u003c\/h3\u003e\n\u003cp data-start=\"547\" data-end=\"980\"\u003eThe \u003cstrong data-start=\"551\" data-end=\"595\"\u003eWehrli 100728 Universal Air Filter Cover\u003c\/strong\u003e is designed to safeguard your investment in high-performance filtration. Whether you're running a cold air intake or turbo kit, this protective wrap forms a \u003cstrong data-start=\"753\" data-end=\"780\"\u003ewater-repellent barrier\u003c\/strong\u003e to shield your air filter from the elements. It keeps harmful dust, mud, and moisture at bay, reducing the frequency of filter maintenance or replacements and helping your engine breathe cleaner air.\u003c\/p\u003e\n\u003ch3 data-start=\"982\" data-end=\"1018\"\u003eBuilt for Harsh Environments\u003c\/h3\u003e\n\u003cp data-start=\"1019\" data-end=\"1409\"\u003ePerfect for off-roaders, racers, and daily drivers who encounter dust, water splashes, and grime, the Wehrli filter cover installs in seconds and delivers dependable protection. It won’t choke airflow, and its breathable mesh construction ensures performance is never compromised. Extend the service life of your filter and preserve intake efficiency no matter how rough the conditions get.\u003c\/p\u003e\n\u003cp data-start=\"1416\" data-end=\"1507\"\u003e\u003cstrong data-start=\"1416\" data-end=\"1428\"\u003eFitment:\u003c\/strong\u003e\u003cbr data-start=\"1428\" data-end=\"1431\"\u003e\u003cstrong data-start=\"1431\" data-end=\"1448\"\u003eUniversal Fit\u003c\/strong\u003e – Compatible with most Wehrli intake and turbo air filters\u003c\/p\u003e\n\u003cp data-start=\"1509\" data-end=\"1556\"\u003e\u003cstrong data-start=\"1509\" data-end=\"1522\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-start=\"1522\" data-end=\"1525\"\u003eManufacturer’s Limited Warranty\u003c\/p\u003e\n\u003cp data-start=\"1558\" data-end=\"1578\"\u003e\u003cstrong data-start=\"1558\" data-end=\"1576\"\u003eFitment Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1579\" data-end=\"1699\"\u003e\n\u003cli data-start=\"1579\" data-end=\"1643\"\u003e\n\u003cp data-start=\"1581\" data-end=\"1643\"\u003eDesigned to fit over conical\/tapered performance air filters\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1644\" data-end=\"1699\"\u003e\n\u003cp data-start=\"1646\" data-end=\"1699\"\u003eNot intended for submerged or deep-water applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027171612,"sku":"WCF100728","price":45.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100728_20Wehrli_20Universal_20Air_20Filter_20Cover00.webp?v=1722363133"},{"product_id":"wehrli-100733-vgt-turbo-heat-blanket-04-5-16-gm-6-6l-duramax","title":"Wehrli 100733 VGT Turbo Heat Blanket | 2004.5-2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDecrease underhood temperatures\u003c\/li\u003e\n\u003cli\u003eDurable high temperature exterior shell material\u003c\/li\u003e\n\u003cli\u003eStainless steel rivet fasteners\u003c\/li\u003e\n\u003cli\u003eEasy to install blanket keeps heat inside the turbo housing\u003c\/li\u003e\n\u003cli\u003eHandmade in the U.S.A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eGreater Turbo Performance with the Wehrli Turbo Heat Blanket\u003c\/h4\u003e\n\u003cp\u003eWith a turbo engine, there are a lot of internals that can quickly overloaded with heat, leading to failing components such as blown head gaskets. Prevent said issues on your turbocharged engine with the Wehrli VGY Turbo Heat Blanket for 2004.5-2016 GM 6.6L Duramax vehicles. The Wehrli VGT Turbo Blanket functions by way of isolating isolating generated heat from the engine, maintains cool intake air temperature, and keeps exhaust gases hot upon expulsion for max performance and longevity. The Turbo Blanket is a high temperature exterior shell material that effectively decreases under the hood temperatures while keeping heat within the turbo housing. If you're looking to further enhance your turbocharger's performance, get the Wehrli VGT Turbo Head Blanket today!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2004.5, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027204380,"sku":"WCF100733","price":155.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100733_1.png?v=1722363119"},{"product_id":"wehrli-100426-valance-filler-panel-kit-15-19-chevy-2500-3500-hd-w-o-tow-hooks-raw","title":"Wehrli 100426 Valance Filler Panel Kit w\/o Tow Hooks, Raw | 2015-2019 Silverado 2500HD\/3500HD","description":"\u003cp\u003eRemoving the OEM plastic lower bumper valance on the 2015-2019 Chevrolet Silverado 2500 \/ 3500 HD trucks is a proven method for improving ground clearance and fitting more aggressive wheel and tire combinations, but leaves an unattractive, gaping void in the lower middle section of the bumper.¬†To solve this issue on customer trucks getting suspension lifts at our shop, we've developed two Lower Valance Filler Panel options for trucks with and without tow hooks. These heavy gauge aluminum panels finish off the lower center cutout in the bumper providing a more aggressive look to lifted or leveled trucks.\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027269916,"sku":"WCF100426","price":227.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100426_1.jpg?v=1722363080"},{"product_id":"wehrli-100453-3-8-bumper-spacer-kit-15-19-gm-2500-3500-hd-truck","title":"Wehrli 100453 3\/8 inch Bumper Spacer Kit | 2015-2019 GM Silverado\/Sierra 2500HD\/3500HD","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2015–2019 Silverado and Sierra HD trucks\u003c\/li\u003e\n\u003cli\u003eProvides 3\/8 inch forward bumper spacing\u003c\/li\u003e\n\u003cli\u003eEliminates tire rubbing without trimming components\u003c\/li\u003e\n\u003cli\u003eAllows wider and more aggressive wheel setups\u003c\/li\u003e\n\u003cli\u003eCompatible with negative offset wheel configurations\u003c\/li\u003e\n\u003cli\u003eCNC machined billet aluminum construction\u003c\/li\u003e\n\u003cli\u003eFlat black powder coat resists corrosion\u003c\/li\u003e\n\u003cli\u003eMaintains OEM fit and mounting integrity\u003c\/li\u003e\n\u003cli\u003eEnhances clearance for taller tire profiles\u003c\/li\u003e\n\u003cli\u003eEasy bolt-on installation with factory hardware\u003c\/li\u003e\n\u003cli\u003eClean, stealthy OEM-style appearance\u003c\/li\u003e\n\u003cli\u003eIdeal for lifted or leveled HD builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eGet More Clearance Without Cutting Into Your Truck\u003c\/h4\u003e\n\u003cp\u003eIf you're tired of tire rub and don't want to take a grinder to your brand-new rig, the Wehrli 3\/8 inch Bumper Spacer Kit is exactly what you need. Designed specifically for 2015–2019 Silverado and Sierra 2500HD\/3500HD trucks, this clean and simple mod gives you just enough clearance to run wider, taller tires without hacking into your factory bumper or valance. It’s the perfect solution for truck owners who want a more aggressive stance without sacrificing factory fit and finish. Whether you’re running a leveled setup or just looking to squeeze in a little more sidewall, this spacer kit helps your build stand out and perform better on the street or trail. The flat black powder coat looks factory but holds up like armor, resisting corrosion and blending right in with your OEM hardware. It’s a small tweak with a big impact, giving you the freedom to explore bigger wheel and tire combinations without compromise. If you're going for a tough look and even tougher performance, this is one upgrade you’ll wish you did sooner.\u003c\/p\u003e\n\u003ch4\u003ePrecision Fitment That Solves Clearance Issues Fast\u003c\/h4\u003e\n\u003cp\u003eThe Wehrli 100453 Bumper Spacer Kit is engineered for proper fitment and long-term durability on 2015–2019 GM 2500HD and 3500HD trucks. Each kit moves the front bumper forward by 3\/8 of an inch using precision CNC-machined billet aluminum spacers that maintain full mounting surface area for strength and support. This slight shift in bumper placement opens up the front wheel wells, allowing for taller and wider tire setups with more aggressive negative offsets, all without needing to trim or modify factory body panels. The spacers are finished in a durable flat black powder coat that provides corrosion resistance while blending into the stock bumper components for a factory-style appearance. Installation is straightforward and requires only basic hand tools, making it an ideal solution for DIY enthusiasts or professional builders. Because the kit is tailored specifically for GM HD trucks, everything lines up exactly how it should with no guesswork or awkward gaps. Whether you’re prepping for larger wheels or just solving fitment headaches, this kit delivers a clean and effective result.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2015, 2016, 2017, 2018, 2019 GM Silverado\/Sierra 2500HD\/3500HD\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for 2015–2019 GM Silverado and Sierra HD models\u003c\/li\u003e\n\u003cli\u003eProvides 3\/8 inch clearance without cutting body parts\u003c\/li\u003e\n\u003cli\u003eHelps eliminate tire rub on front bumper and valance\u003c\/li\u003e\n\u003cli\u003eIdeal for trucks with wider or more aggressive wheels\u003c\/li\u003e\n\u003cli\u003eMaintains factory appearance and mounting integrity\u003c\/li\u003e\n\u003cli\u003eFinished in flat black for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eCNC machined from high-quality billet aluminum\u003c\/li\u003e\n\u003cli\u003eNo trimming or permanent modifications required\u003c\/li\u003e\n\u003cli\u003eBest suited for leveled or lifted trucks\u003c\/li\u003e\n\u003cli\u003eKit is a simple and clean bolt-on upgrade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027335452,"sku":"WCF100453","price":184.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100453_20_1.jpg?v=1722363092"},{"product_id":"wehrli-100840-traction-bar-installation-kit-01-10-gm-6-6l-duramax","title":"Wehrli 100840 Traction Bar Installation Kit | 2001-2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cspan style=\"font-weight: bold;\"\u003eKit Includes:\u003c\/span\u003e\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eIncludes Axle side bolt on and Frame side weld on mounts\u003c\/li\u003e\n\u003cli\u003eGrade 8 Hardware\u003c\/li\u003e\n\u003cli\u003eThis part number is mounting hardware only. Bars not included.\u003c\/li\u003e\n\u003cli\u003ePowder Coating with zinc primer base coat on axle side brackets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eBuilt in house at WCFab our traction bar brackets bolt on to the bottom of the axle tube via the axle u-bolts and weld to the frame on the front end. Grade 8 hardware connects the bars to the mounts on the frame and axle.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e***THIS IS A REPLACEMENT HARDWARE \/ INSTALL KIT, BARS NOT INCLUDED. PLEASE SEE OUR COMPLETE TRACTION BAR KITS FOR THE FULL ASSEMBLY***\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027400988,"sku":"WCF100840","price":276.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100840.jpg?v=1722363124"},{"product_id":"wehrli-100443-billet-oil-fill-tube-cap-01-gm-gm-6-6l-duramax-lb7-lly-lbz-lmm-lml-l5p-black-anodized","title":"Wehrli 100443 Black Anodized Billet Oil Fill Tube Cap | 2001-2026 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCNC machined billet aluminum construction\u003c\/li\u003e\n\u003cli\u003eDirect OEM replacement for easy install\u003c\/li\u003e\n\u003cli\u003eComplete cap, not just a cover\u003c\/li\u003e\n\u003cli\u003eFits 2001-2026 GM Duramax diesel engines\u003c\/li\u003e\n\u003cli\u003eAvailable in clear or black anodized finish\u003c\/li\u003e\n\u003cli\u003eHelps clean up engine bay appearance\u003c\/li\u003e\n\u003cli\u003eDurable anodized coating for long life\u003c\/li\u003e\n\u003cli\u003eMade in the USA by WCFab\u003c\/li\u003e\n\u003cli\u003ePrecision fit for factory oil fill tube\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDress Up Your Duramax With Quality You Can See\u003c\/h4\u003e\n\u003cp\u003eIf you’ve ever popped the hood on your Duramax and noticed how the plastic oil fill cap looks completely out of place, this billet aluminum oil fill tube cap from Wehrli Custom Fabrication is exactly what you need. Designed as a true replacement, not just a cheap cover, this cap brings both style and durability to your engine bay. Precision CNC machined from high-quality billet aluminum and finished in sleek black anodizing, it’s built to last while giving your truck a clean, custom appearance. Whether you’re detailing your show rig or just want to replace a worn-out factory cap with something better, this piece fits the bill. Installation is quick and easy since it’s made to fit directly onto your factory oil fill tube without modification.\u003c\/p\u003e\n\u003ch4\u003eBuilt for Duramax Owners Who Appreciate the Details\u003c\/h4\u003e\n\u003cp\u003eThis oil fill cap is compatible with all 2001-2026 GM Silverado and Sierra 2500HD and 3500HD models equipped with the 6.6L Duramax engine. Its durable anodized coating not only looks great but also helps resist corrosion and wear over time, making it ideal for daily drivers, tow rigs, or weekend toys. WCFab takes pride in machining these caps right here in the USA, ensuring every detail meets their high standards. Whether you choose to match it with other blacked-out accessories or let it stand out as a subtle upgrade, this billet oil fill cap is the perfect finishing touch for anyone who takes pride in their truck’s appearance and quality.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, \u003cspan class=\"NormalTextRun SCXW62635998 BCX0\"\u003e2024, 2025\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW62635998 BCX0\"\u003e, 2026\u003c\/span\u003e GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027433756,"sku":"WCF100443","price":51.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100443_1.jpg?v=1722363088"},{"product_id":"wehrli-100390-marker-light-delete-kit-billet-20-21-gmc-2500-3500-hd-w-logo-raw","title":"Wehrli 100390 Marker Light Delete Kit, Billet, with Logo, Raw | 2020-2025 Sierra 2500HD\/3500HD","description":"\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eHighlights:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eQty. 4 CNC Machined Billet Aluminum Marker Light Delete Plates\u003c\/li\u003e\n\u003cli\u003eHigh quality mounting hardware\u003c\/li\u003e\n\u003cli\u003eMarker Light Harness Dummy Plugs\u003c\/li\u003e\n\u003cli\u003eAvailable with or without machined WCFab logo in Raw Aluminum Finish or Fine Texture Black Powder Coat\u003c\/li\u003e\n\u003cli\u003eMade in USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003eClean up the look of your 2020-2025 GMC Sierra or Denali HD truck by replacing the amber fender flare marker lights with these CAD Designed, CNC machined, billet aluminum marker light delete plates from WCFab. Available with machined WCFab logo or without in Raw Aluminum for paint matching or Fine Texture Black Powder Coat to blend into the OEM black plastic fender trim.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eInstalls easily with basic hand tools.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027499292,"sku":"WCF100390","price":251.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100390_20_7.jpg?v=1722363075"},{"product_id":"wehrli-100704-3-v-band-style-down-pipe-2011-2015-duramax-lml-stainless","title":"Wehrli 100704 3 inch Stainless Turbo Downpipe | 2011-2015 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LML","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2011–2015 6.6L Duramax LML engines\u003c\/li\u003e\n\u003cli\u003eReplaces restrictive factory downpipe\u003c\/li\u003e\n\u003cli\u003eFull 3-inch stainless steel construction\u003c\/li\u003e\n\u003cli\u003eCompatible with v-band style turbo connections\u003c\/li\u003e\n\u003cli\u003eNot compatible with 3-bolt flange turbos\u003c\/li\u003e\n\u003cli\u003eIncludes heat wrap and clamps for installation\u003c\/li\u003e\n\u003cli\u003eImproves exhaust flow and turbo response\u003c\/li\u003e\n\u003cli\u003eReduces backpressure for better performance\u003c\/li\u003e\n\u003cli\u003eDesigned for factory or drop-in style turbos\u003c\/li\u003e\n\u003cli\u003eDurable and corrosion-resistant stainless material\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on fit for easy installation\u003c\/li\u003e\n\u003cli\u003eMade for Silverado and Sierra HD trucks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eLet Your Duramax Breathe With A Real Upgrade\u003c\/h4\u003e\n\u003cp\u003eIf you’re looking to ditch the crushed, restrictive factory downpipe and unlock real airflow from your turbo, the Wehrli 3-Inch Stainless Turbo Downpipe is the upgrade your LML Duramax has been waiting for. Built specifically for 2011–2015 Silverado and Sierra 2500HD\/3500HD trucks, this downpipe delivers smoother exhaust flow and better turbo response from the moment you hit the throttle. The full 3-inch diameter and high-quality stainless steel construction mean you’re not only improving performance, you’re also adding long-term durability to your setup. Whether you’re towing, daily driving, or building for more boost, this bolt-on replacement eliminates a major bottleneck in your exhaust system. It comes with heat wrap and clamps included, so you’ve got everything needed for a clean and efficient install. Designed to work with factory turbos or drop-in replacements using a v-band flange, this pipe lets your setup breathe like it should. If you want a quick win in performance and drivability, this downpipe makes it easy to feel the difference.\u003c\/p\u003e\n\u003ch4\u003eBuilt To Eliminate Restrictions And Maximize Flow\u003c\/h4\u003e\n\u003cp\u003eThe Wehrli 100704 3-Inch Stainless Turbo Downpipe is a precision-fit upgrade for 2011–2015 GM 6.6L Duramax LML engines using a v-band style turbo connection. Unlike the stock crushed downpipe, this full 3-inch mandrel-bent stainless steel pipe ensures smooth, unrestricted exhaust flow from the turbo outlet. This results in reduced backpressure, improved turbo spool-up, and lower exhaust gas temperatures, key performance benefits for both tuned and stock applications. The downpipe is designed as a direct bolt-on replacement for trucks running the factory or drop-in style turbos with a v-band flange. It includes high-temp heat wrap and quality clamps to protect surrounding components and maintain a clean engine bay. This kit is not compatible with 3-bolt flange turbos and should only be used with v-band setups. Ideal for performance-minded daily drivers and workhorse builds alike, the Wehrli downpipe offers a simple, effective upgrade that supports improved efficiency and long-term reliability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \u003c\/strong\u003e 2011, 2012, 2013, 2014, 2015 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LML\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2011–2015 GM Silverado\/Sierra 2500HD and 3500HD with 6.6L LML Duramax\u003c\/li\u003e\n\u003cli\u003eDesigned for use with factory or drop-in style turbos using a v-band connection\u003c\/li\u003e\n\u003cli\u003eNot compatible with 3-bolt flange turbo configurations\u003c\/li\u003e\n\u003cli\u003eReplaces the restrictive crushed factory downpipe\u003c\/li\u003e\n\u003cli\u003eConstructed from high-quality 3-inch stainless steel tubing\u003c\/li\u003e\n\u003cli\u003eImproves exhaust flow and reduces turbo backpressure\u003c\/li\u003e\n\u003cli\u003eHelps lower EGTs and improve throttle response\u003c\/li\u003e\n\u003cli\u003eKit includes heat wrap and clamps for installation\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation with no major modifications required\u003c\/li\u003e\n\u003cli\u003eRecommended for performance upgrades and improved drivability\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027564828,"sku":"WCF100704","price":257.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100704_1.jpg?v=1722363112"},{"product_id":"wehrli-100393-marker-light-delete-kit-billet-20-21-gmc-2500-3500-hd-w-o-logo-fine-texture-black","title":"Wehrli 100393 Marker Light Delete Kit, Billet, w\/o Logo, Fine Texture Black | 2020-2026 GMC Sierra 2500HD\/3500HD","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2020-2026 Sierra 2500HD and 3500HD\u003c\/li\u003e\n\u003cli\u003eDeletes factory amber marker lights\u003c\/li\u003e\n\u003cli\u003eBillet aluminum construction for durability\u003c\/li\u003e\n\u003cli\u003eFine texture black powder coat finish\u003c\/li\u003e\n\u003cli\u003eNo logo for a clean appearance\u003c\/li\u003e\n\u003cli\u003eMatches factory plastic trim pieces\u003c\/li\u003e\n\u003cli\u003eImproves front fender styling\u003c\/li\u003e\n\u003cli\u003eDirect replacement with simple installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eA Sleek Solution for a Cleaner Front End\u003c\/h4\u003e\n\u003cp\u003eIf you're looking to get rid of the factory amber fender marker lights on your 2020 to 2026 GMC Sierra 2500HD\/3500HD, the Wehrli 100393 Marker Light Delete Kit offers a simple and refined alternative. These billet aluminum inserts are precision-machined for a perfect fit and finished in fine texture black to blend in seamlessly with your factory trim. With no logos or branding on the face, the result is a clean and understated look that gives your truck a more aggressive and modern style without being flashy.\u003c\/p\u003e\n\u003ch4\u003eBuilt to Match Built to Last\u003c\/h4\u003e\n\u003cp\u003eEach piece is crafted from high-quality billet aluminum, giving you long-term durability that holds up against road grime, weather, and off-road abuse. The fine texture black powder coat finish not only looks great but also resists fading and scratches over time. Installation is straightforward and requires no major modifications, making this a quick upgrade you can do at home with basic tools. Whether you're after a blackout look or just want to streamline your truck’s appearance, this marker light delete kit is a clean upgrade that blends factory fitment with custom style.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Sierra 2500HD\/3500HD\u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027630364,"sku":"WCF100393","price":299.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100390_20_1.png?v=1722363078"},{"product_id":"wehrli-100462-3-4-bumper-spacer-kit-15-19-gm-2500-3500-hd-truck","title":"Wehrli 100462 3\/4\" inch Bumper Spacer Kit | 2015-2019 GM Silverado\/Sierra 2500HD\/3500HD","description":"\u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003eFeatures:\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eBillet Aluminum 3\/4 (0.750) in. Front Bumper Spacer Kit\u003c\/li\u003e\n\u003cli\u003eIncludes high quality mounting hardware\u003c\/li\u003e\n\u003cli\u003eFlat Black Powder Coat Finish\u003c\/li\u003e\n\u003cli\u003eProvides additional clearance to front bumper for aftermarket wheel, tire, and suspension setups to prevent rubbing\u003c\/li\u003e\n\u003cli\u003eFits Gas and Diesel HD Trucks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e3\/4\" inch Bumper Spacer Kit\u003c\/strong\u003e\u003cbr\u003e2015-2019 Silverado and Sierra 2500HD\/3500HD CNC machined billet aluminum spacer kits from WCFab move the front bumper forward off the frame horns 3\/4 of an inch while maintaining maximum mounting surface area for structural integrity. Moving the bumper forward allows for fitment of wider and taller wheel and tire combinations with more negative offset and prevents or reduces the need for additional trimming of OEM components. Finished in Flat Black powder coat for additional corrosion resistance and OEM like appearance. Installs easily with basic hand tools.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFitment: \u003c\/strong\u003e2015, 2016, 2017, 2018, 2019 GM Silverado\/Sierra 2500HD\/3500HD\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e For less aggressive fitments, please see our 3\/8\" Spacer Kit part number WCF100453\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027663132,"sku":"WCF100462","price":257.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100462_1.jpg?v=1722363092"},{"product_id":"wehrli-100358-spacer-plate-kit-t4-flange-1-5-in-incl-studs-and-gaskets","title":"Wehrli 100358 1.5 inch T4 Spacer Plate Kit | Universal","description":"\u003ch3\u003eWehrli WCF100358 5in Intake Kit With Box – Polished | 03-07 Ford 6.0L Powerstroke\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eImprove Airflow and Power with a High-Performance Intake Upgrade\u003c\/strong\u003e\u003cbr\u003eThe Wehrli WCF100358 5in Polished Intake Kit with Box is built to unlock performance in your 2003–2007 Ford 6.0L Powerstroke. This high-flow intake system significantly improves throttle response and supports enhanced horsepower and torque by replacing the restrictive factory intake with a sleek 5\" polished aluminum tube and a large oiled performance filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptimized for Flow and Engine Efficiency\u003c\/strong\u003e\u003cbr\u003eDesigned for maximum airflow, this system delivers cooler, denser air to your turbo, resulting in noticeable gains in performance and efficiency. The polished finish adds a clean, aggressive look to your engine bay while the custom-fit airbox helps shield the filter from engine heat for more consistent intake temperatures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDyno-Proven Gains\u003c\/strong\u003e\u003cbr\u003eWehrli’s intake system has shown measurable increases in horsepower and torque—particularly in tuned or modified trucks. It supports additional modifications like tuning, upgraded turbos, or exhaust systems, making it an ideal foundation for your Powerstroke performance build.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEasy Installation\u003c\/strong\u003e\u003cbr\u003eThis bolt-on kit includes all required hardware for a straightforward install. The intake is designed to mount cleanly in the factory location with no permanent modifications required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e5” polished aluminum intake tube for superior airflow\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-flow oiled filter for maximum filtration and performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom-fit airbox helps reduce heat soak\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDyno-tested for gains in horsepower and torque\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for tuned or performance-modified trucks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eComplete bolt-on kit – no cutting or fabrication required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ePolished aluminum 5” intake tube\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-flow oiled filter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom-fit airbox\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCouplers and clamps\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInstallation hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2003, 2004, 2005, 2006, 2007 Ford F-250\/F-350 6.0L Powerstroke\u003cbr\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e Manufacturer’s limited warranty\u003cbr\u003e\u003cstrong\u003eFitment Notes:\u003c\/strong\u003e Designed for use with the factory turbo and compatible intercooler piping. 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The Wehrli 100705 3-inch Stainless Down Pipe is a direct replacement for the factory crushed unit, giving your turbo the breathing room it’s been waiting for. With a smooth, unrestricted path, you’ll experience a faster spool-up, cooler exhaust temps, and stronger throttle response. Whether you tow, daily drive, or just want to push your build further, this upgrade delivers a big impact without needing major modifications. It’s built to work seamlessly with your factory turbo or any factory-style drop-in unit that uses the 3-bolt flange. Plus, the included heat wrap and clamps make it a complete, clean install. This is one of those upgrades that pays off every time you hit the throttle.\u003c\/p\u003e\n\u003ch4\u003eDesigned To Improve Flow And Withstand The Heat\u003c\/h4\u003e\n\u003cp\u003eThe Wehrli 100705 Down Pipe is built from precision-formed 3-inch stainless steel to provide long-term durability and performance for your 2015.5–2016 Duramax LML. This pipe is designed to replace the OEM downpipe that uses a restrictive crushed bend, which limits exhaust flow and turbo efficiency. By utilizing a full 3-inch diameter and smooth transitions, this downpipe allows for faster evacuation of exhaust gases, helping to reduce turbo lag and lower EGTs under load. It features a 3-bolt flange that mates directly to the factory turbo or compatible aftermarket drop-in units. All necessary hardware is included, including heat wrap and clamps, to manage under-hood temps and maintain installation integrity. This pipe is not compatible with the earlier 2011–2014 v-band style connections, so proper application fitment is key. Whether you're aiming for performance gains or improved drivability, this component is engineered to perform.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2015.5, 2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LML\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for 2015.5–2016 GM 6.6L LML Duramax models only.\u003c\/li\u003e\n\u003cli\u003eFits trucks with the 3-bolt flange style exhaust connection.\u003c\/li\u003e\n\u003cli\u003eDoes not fit 2011–2014 trucks with v-band connection, use part number WCF100704 for those models.\u003c\/li\u003e\n\u003cli\u003eCompatible with factory turbos and drop-in replacement turbos that retain the 3-bolt flange.\u003c\/li\u003e\n\u003cli\u003eReplaces restrictive factory downpipe to improve exhaust flow.\u003c\/li\u003e\n\u003cli\u003eIncludes heat wrap and clamps for installation and thermal protection.\u003c\/li\u003e\n\u003cli\u003eFabricated from high-quality stainless steel for long-term durability and corrosion resistance.\u003c\/li\u003e\n\u003cli\u003eHelps reduce exhaust gas temperatures and improve turbo efficiency.\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended for best fitment and performance.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027794204,"sku":"WCF100705","price":348.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100705_1.jpg?v=1722363112"},{"product_id":"wehrli-100096-billet-turbo-resonator-block-off-plate-11-16-gm-6-6l-duramax-lml","title":"Wehrli 100096 Billet Turbo Resonator Block Off Plate | 2011-2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LML","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \n\n\u003cul\u003e\n  \u003cli\u003eFits 2011–2016 6.6L Duramax LML engines\u003c\/li\u003e\n  \u003cli\u003eRemoves factory turbo resonator for cleaner look\u003c\/li\u003e\n  \u003cli\u003eCNC machined from 6061 billet aluminum\u003c\/li\u003e\n  \u003cli\u003eQuick and easy installation in minutes\u003c\/li\u003e\n  \u003cli\u003eImproves engine bay appearance\u003c\/li\u003e\n  \u003cli\u003eBlack anodized finish for corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eEngraved Wehrli logo for a custom look\u003c\/li\u003e\n  \u003cli\u003eIncludes stainless steel mounting hardware\u003c\/li\u003e\n  \u003cli\u003eMade in the USA\u003c\/li\u003e\n  \u003cli\u003e100% warranty and emissions friendly\u003c\/li\u003e\n  \u003cli\u003ePerfect for dress-up or mild custom builds\u003c\/li\u003e\n  \u003cli\u003eNo tuning or modifications required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e Clean Up Your Engine Bay With Simple Style \u003c\/h4\u003e \n\n\u003cp\u003e If you’re tired of the bulky plastic turbo resonator cluttering up your engine bay, the Wehrli 100096 Billet Block Off Plate is a sleek and simple way to clean things up. Designed for 2011–2016 GM Silverado and Sierra 2500HD\/3500HD trucks with the 6.6L Duramax LML, this billet aluminum plate adds a custom look in minutes. Installation is quick and painless, and the result is a cleaner, more streamlined appearance under the hood. The engraved Wehrli Custom Fabrication logo and black anodized finish give it a sharp, high-end look that pairs well with both stock and modified setups. Best of all, it’s emissions friendly and requires no tuning or other modifications. Whether you're dressing up your daily driver or putting the finishing touch on a show build, this plate adds just the right amount of detail. It’s a small upgrade that makes a big visual impact. \u003c\/p\u003e \n\n\u003ch4\u003e Machined Precision And Form Fit Functionality In One \u003c\/h4\u003e \n\n\u003cp\u003e The Wehrli 100096 Billet Turbo Resonator Block Off Plate is engineered for a direct, emissions-friendly replacement of the factory turbo resonator found on 2011–2016 Duramax LML engines. This CNC-machined block off plate is crafted from durable 6061 billet aluminum for long-term strength and precise fitment. By eliminating the large plastic resonator, the plate not only improves the overall look of your engine bay but also maintains factory airflow characteristics without compromising performance. Its black anodized finish resists corrosion and blends seamlessly with the rest of the engine components. The plate includes stainless steel hardware and installs using OEM mounting points, making it a true bolt-on part that requires no tuning or adjustments. Every unit is made in the USA and backed by a 100% warranty for peace of mind. This part is ideal for those who want a cleaner, custom underhood appearance without any downsides to drivability or emissions compliance. \u003c\/p\u003e \n\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LML \u003c\/p\u003e \n\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e \u003c\/p\u003e\u003cul\u003e\n  \u003cli\u003eFits 2011–2016 GM Silverado and Sierra 2500HD\/3500HD with 6.6L Duramax LML engine\u003c\/li\u003e\n  \u003cli\u003eReplaces the large factory plastic turbo resonator\u003c\/li\u003e\n  \u003cli\u003eDesigned to improve engine bay appearance with a cleaner look\u003c\/li\u003e\n  \u003cli\u003eMade from CNC-machined 6061 billet aluminum\u003c\/li\u003e\n  \u003cli\u003eBlack anodized finish resists corrosion and fading\u003c\/li\u003e\n  \u003cli\u003eEngraved with Wehrli Custom Fabrication logo\u003c\/li\u003e\n  \u003cli\u003eIncludes stainless steel mounting hardware for easy install\u003c\/li\u003e\n  \u003cli\u003eQuick bolt-on installation with no tuning required\u003c\/li\u003e\n  \u003cli\u003eDoes not affect emissions—completely emissions friendly\u003c\/li\u003e\n  \u003cli\u003eManufactured in the USA and backed by a 100% warranty\u003c\/li\u003e\n\u003c\/ul\u003e  ","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027859740,"sku":"WCF100096","price":45.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100096_1.jpg?v=1722363037"},{"product_id":"wehrli-100425-valance-filler-panel-kit-15-19-chevy-2500-3500-hd-w-tow-hooks-raw","title":"Wehrli 100425 Valance Filler Panel Kit with Tow Hooks Raw | 2015-2019 GM Silverado 2500HD\/3500HD","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImproves ground clearance for off-road use\u003c\/li\u003e\n\u003cli\u003eAllows larger wheel and tire setups\u003c\/li\u003e\n\u003cli\u003eCleanly fills factory valance void\u003c\/li\u003e\n\u003cli\u003eHeavy gauge aluminum construction\u003c\/li\u003e\n\u003cli\u003eRaw finish for custom paint matching\u003c\/li\u003e\n\u003cli\u003eCutouts retain full tow hook access\u003c\/li\u003e\n\u003cli\u003eCompatible with factory tow hooks\u003c\/li\u003e\n\u003cli\u003eEnhances front-end appearance\u003c\/li\u003e\n\u003cli\u003eDesigned for lifted or leveled trucks\u003c\/li\u003e\n\u003cli\u003eInstalls using existing factory hardware\u003c\/li\u003e\n\u003cli\u003ePrecision fit for 2015–2019 Silverado HD\u003c\/li\u003e\n\u003cli\u003eBuilt in the USA for quality assurance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eGive Your Silverado A Cleaner More Purposeful Look\u003c\/h4\u003e\n\u003cp\u003eIf you’ve pulled the factory valance off your Silverado 2500HD or 3500HD, you already know it opens up space for bigger tires and better clearance, but it also leaves an awkward gap that kills the truck’s front-end look. The Wehrli Valance Filler Panel Kit with Tow Hooks is designed to clean up that empty space and give your truck a finished, aggressive appearance that actually complements the lift or level you've added. Made for 2015-2019 Silverado HDs with factory tow hooks, this panel is a smart add-on that ties everything together. Instead of a rough, unfinished bumper opening, you get a sleek raw aluminum panel with built-in cutouts that keep your tow hooks fully accessible. It installs easily using your existing factory hardware, so there’s no need for cutting, drilling, or modifying your bumper. The raw finish is perfect if you’re planning to color-match the panel to your truck or apply a custom coating. Whether you’re cruising through town or tackling trails, this upgrade helps your front end look intentional, not incomplete.\u003c\/p\u003e\n\u003ch4\u003eBuilt For Better Clearance Without Sacrificing Function\u003c\/h4\u003e\n\u003cp\u003eThe Wehrli 100425 Valance Filler Panel is engineered for truck owners who want more than just style, they want functional, trail-ready performance without compromise. Built from heavy gauge aluminum, this panel is designed to withstand the elements while offering a precision fit for 2015-2019 Silverado 2500HD and 3500HD models equipped with factory tow hooks. It fills the open void left behind after removing the lower valance, which is a common mod done to increase ground clearance and make room for more aggressive wheel and tire combinations. The panel includes specifically shaped cutouts to maintain full access to the front tow hooks, ensuring recovery points remain usable when off-roading or towing. The use of factory hardware makes installation straightforward and secure, with no need for aftermarket brackets or extra tools. Its raw finish gives you the freedom to paint or powder coat it to match your exact build. This is a durable, no-nonsense solution that adds utility and a cleaner, tougher appearance where it counts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \u003c\/strong\u003e 2015, 2016, 2017, 2018, 2019 Silverado 2500HD\/3500HD\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOnly compatible with 2015-2019 Silverado 2500HD\/3500HD models\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for trucks equipped with factory tow hooks\u003c\/li\u003e\n\u003cli\u003eFiller panel includes cutouts for tow hook access\u003c\/li\u003e\n\u003cli\u003eRaw aluminum finish intended for custom paint or coating\u003c\/li\u003e\n\u003cli\u003eNot compatible with trucks without front tow hooks\u003c\/li\u003e\n\u003cli\u003eDoes not include tow hooks or additional mounting hardware\u003c\/li\u003e\n\u003cli\u003eRequires removal of factory lower bumper valance\u003c\/li\u003e\n\u003cli\u003ePanel mounts using factory hardware for installation\u003c\/li\u003e\n\u003cli\u003eIntended to improve appearance after suspension lift or leveling\u003c\/li\u003e\n\u003cli\u003eDeveloped for better clearance and tire fitment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027925276,"sku":"WCF100425","price":227.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100425_20_3.jpg?v=1767369144"},{"product_id":"wehrli-100469-transmission-cooler-thermostat-bypass-kit-17-19-gm-6-6l-duramax-l5p-black-anodized","title":"Wehrli 100469 Black Anodized Transmission Cooler Thermostat Bypass Kit | 2017-2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax L5P","description":"\u003cspan style=\"font-weight: bold;\"\u003eFeatures:\u003c\/span\u003e\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Machined Billet Aluminum Thermostatic Bypass Plug\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish\u003c\/li\u003e\n\u003cli\u003eHigh temperature silicone O-ring seals\u003c\/li\u003e\n\u003cli\u003eReduces fluid flow restriction to trans cooler\u003c\/li\u003e\n\u003cli\u003eSimple Installation\u003c\/li\u003e\n\u003cli\u003eExperience fluid temperature drops from 15-50 degrees F\u003c\/li\u003e\n\u003cli\u003eDirect replacement of the failure prone OEM thermostat\u003c\/li\u003e\n\u003cli\u003eEasy swap back to OEM setup for cold weather use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eAs a direct replacement for the failure prone OEM thermostat, the Transmission Cooler Thermostat Bypass Plug can drop fluid temperature from 15-50 degrees F by reducing fluid flow restriction to the trans cooler. In the stock application, we've seen the valve fail forcing trans fluid around the cooler in warm weather conditions that cause dangerous fluid temperatures for built and stock transmissions alike.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eRecommended for trucks with stock or built transmissions and performing heavy towing in warm climates to help keep fluid temperatures in check.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe WCFab Transmission Cooler Thermostat Bypass Plug is a quick and easy install and will work with the following range of GM vehicles equipped with a factory installed transmission cooler thermostat bypass (6L80, 6L90, 8L90):\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e2017-2019 Chevrolet Silverado \u0026amp; GMC Sierra 2500HD\/3500HD with 6.6L Duramax Diesel\u003c\/li\u003e\n\u003cli\u003e2014-2018 Chevrolet Silverado \u0026amp; GMC Sierra 1500 with 4.3L 6 Cyl, 5.3L 8 Cyl, and 6.2L 8 Cyl Gas Engines\u003c\/li\u003e\n\u003cli\u003e2015-2020 Chevrolet Suburban, Tahoe \u0026amp; GMC Yukon with 5.3L 8 Cyl, and 6.2L 8 Cyl Gas Engines\u003c\/li\u003e\n\u003cli\u003e2015 Cadillac Escalade with 6.2L 8 Cyl Gas Engine\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527027958044,"sku":"WCF100469","price":59.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100469_20_1.jpg?v=1722363093"},{"product_id":"wehrli-100796-map-sensor-seal-bracket-06-10-lbz-lmm-duramax","title":"Wehrli 100796 MAP Sensor Seal \u0026 Bracket | 2006-2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncludes MAP sensor seal and bracket\u003c\/li\u003e\n\u003cli\u003eDesigned for 2006–2010 Duramax LMM engines\u003c\/li\u003e\n\u003cli\u003eRequired for WCFab Y-bridge and turbo installs\u003c\/li\u003e\n\u003cli\u003eReplaces hose-mounted MAP sensor setups\u003c\/li\u003e\n\u003cli\u003eAllows direct mounting to intake manifold\u003c\/li\u003e\n\u003cli\u003eEnsures proper MAP sensor sealing and fit\u003c\/li\u003e\n\u003cli\u003ePrevents boost leaks from poor MAP sensor sealing\u003c\/li\u003e\n\u003cli\u003eEssential for retrofitting late-model LMM configurations\u003c\/li\u003e\n\u003cli\u003eDurable bracket construction for long-lasting reliability\u003c\/li\u003e\n\u003cli\u003eSimple, bolt-on installation with common tools\u003c\/li\u003e\n\u003cli\u003eCompatible with most aftermarket intake upgrades\u003c\/li\u003e\n\u003cli\u003eMade in the USA and built for performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eEliminate The Guesswork And Seal It Right The First Time\u003c\/h4\u003e\n\u003cp\u003eIf you're upgrading your 2006–2010 Duramax with a WCFab Y-bridge or turbo kit, the Wehrli 100796 MAP Sensor Seal \u0026amp; Bracket is one of those small but critical pieces you don’t want to overlook. This kit ensures your MAP sensor mounts properly when your stock setup isn’t compatible with new intake hardware. It’s especially useful for late-model LMM trucks where the MAP sensor is connected via a hose instead of bolted to the manifold. Rather than trying to cobble together a makeshift solution, this bracket and seal provide a clean, bolt-on fix that’s designed to do the job right. You’ll avoid frustrating boost leaks and protect your engine from poor sensor readings that can affect drivability and performance. Installation is straightforward and doesn’t require anything fancy, just the right part and a few basic tools. Whether you're building for power or just doing the job cleanly, this is the kind of hardware that finishes a project the right way.\u003c\/p\u003e\n\u003ch4\u003eDesigned To Adapt LMM MAP Sensor Placement With Precision\u003c\/h4\u003e\n\u003cp\u003eThe Wehrli 100796 MAP Sensor Seal \u0026amp; Bracket is engineered for Duramax LMM owners upgrading their intake system with aftermarket components such as WCFab Y-bridges or turbo kits. On many late-model LMM trucks, the factory MAP sensor is mounted remotely using a hose, making it incompatible with bolt-on-style manifolds. This kit solves that problem by providing a purpose-built bracket and a new MAP sensor seal that allow the sensor to be mounted directly to the intake manifold. By doing so, it restores proper sensor placement for accurate boost readings and reduces the risk of pressure loss or signal interference from loose connections. The components are designed to integrate smoothly into custom intake setups without requiring modification. It's a bolt-on, durable solution that ensures reliable sensor performance under boost. Ideal for enthusiasts focused on performance, tuning accuracy, and long-term reliability, this bracket and seal kit is a must-have for properly completing your intake upgrade.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2006, 2007, 2008, 2009, 2010 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned specifically for 2006–2010 GM 6.6L Duramax LMM engines\u003c\/li\u003e\n\u003cli\u003eEssential when installing WCFab Y-bridge or turbo kits\u003c\/li\u003e\n\u003cli\u003eRequired if your MAP sensor connects via hose instead of bolting directly to the manifold\u003c\/li\u003e\n\u003cli\u003eAllows proper MAP sensor mounting to the intake manifold\u003c\/li\u003e\n\u003cli\u003ePrevents boost leaks and inaccurate sensor readings\u003c\/li\u003e\n\u003cli\u003eIncludes both MAP sensor seal and bracket for a complete solution\u003c\/li\u003e\n\u003cli\u003eCompatible with late-model LMM configurations\u003c\/li\u003e\n\u003cli\u003eIdeal for custom intake setups or retrofit applications\u003c\/li\u003e\n\u003cli\u003eSimple, bolt-on installation with basic tools\u003c\/li\u003e\n\u003cli\u003eHelps ensure proper drivability and tuning accuracy\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527028023580,"sku":"WCF100796","price":17.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100796.jpg?v=1722363119"},{"product_id":"wehrli-100442-billet-oil-fill-tube-cap-01-gm-gm-6-6l-duramax-lb7-lly-lbz-lmm-lml-l5p-clear-anodized","title":"Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCNC machined from billet aluminum\u003c\/li\u003e\n\u003cli\u003eClear anodized finish for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eDirect OEM replacement cap, not a cover\u003c\/li\u003e\n\u003cli\u003eIncludes o-ring for leak-free seal\u003c\/li\u003e\n\u003cli\u003eMachined cam lock for secure fitment\u003c\/li\u003e\n\u003cli\u003eEngraved Wehrli Custom logo underneath\u003c\/li\u003e\n\u003cli\u003eCompatible with Duramax and LS engines\u003c\/li\u003e\n\u003cli\u003eMatches other WCFab billet engine caps\u003c\/li\u003e\n\u003cli\u003eQuick and easy installation\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAdd A Sleek Look to your Engine Bay\u003c\/h4\u003e\n\u003cp\u003eIf you're the kind of truck owner who appreciates the details under the hood as much as performance out on the road, the Wehrli Billet Oil Fill Tube Cap is a small but impactful upgrade worth your attention. Designed as a direct replacement for the factory plastic oil cap on 2001–2026 Silverado and Sierra 2500HD\/3500HD trucks with the 6.6L Duramax, this piece adds both style and strength to an often-overlooked component. Unlike flimsy plastic caps that can wear out over time, this is a CNC-machined billet aluminum cap built for long-term durability. The clear anodized finish adds corrosion resistance while keeping the look clean and sharp. It’s a complete cap, not just a dress-up cover, and it’s engineered to seal tight with a precision-machined cam lock engagement and a high-quality o-ring seal to ensure leak-free performance. What’s more, this cap pairs perfectly with other Wehrli billet pieces like their coolant tank and brake reservoir caps, letting you give your engine bay a cohesive, custom touch. Whether you're popping the hood at a show or just wrenching in the garage, that extra detail stands out.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Sierra\/Silverado 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDirect replacement for the following GM OEM model numbers:\u003c\/strong\u003e 97350955, 97216410, 12573341, 12677347\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlso compatible with 2.8L LWN Duramax and the following GM LS gasoline engines:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4.8L V8 - LR4, LY2, L20\u003c\/li\u003e\n\u003cli\u003e5.3L V8 - LC9, LH6, LH8, LH9, LMF, LM4, LM7, LY5, LMG, LS4, L33, L59\u003c\/li\u003e\n\u003cli\u003e5.7L V8 - LS1, LS6\u003c\/li\u003e\n\u003cli\u003e6.0L V8 - LQ4, LQ9, LS2, L76, L98, L77, LY6, L96, LFA, LZ1\u003c\/li\u003e\n\u003cli\u003e6.2L V8 - LS3, LS9, LSA, L92, L99 \u003c\/li\u003e\n\u003cli\u003e7.0L V8 - LS7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527028089116,"sku":"WCF100442","price":51.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100442_20_2.jpg?v=1765903502"},{"product_id":"wehrli-100800-spacer-plate-kit-t4-flange-1-in-incl-studs-and-gaskets","title":"Wehrli 100800 1 inch T4 Ceramic Spacer Plate Kit | 2003-2007 Dodge RAM 2500\/3500 5.9L Cummins","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 inch thick divided T4 spacer plate\u003c\/li\u003e\n\u003cli\u003eCeramic coated for added heat resistance\u003c\/li\u003e\n\u003cli\u003eDurable steel construction for long-term use\u003c\/li\u003e\n\u003cli\u003eIncludes M10 studs and locking nuts\u003c\/li\u003e\n\u003cli\u003eComes with two high-quality T4 gaskets\u003c\/li\u003e\n\u003cli\u003eImproves turbocharger fitment and clearance\u003c\/li\u003e\n\u003cli\u003eCompatible with 2003–2007 RAM 5.9L Cummins\u003c\/li\u003e\n\u003cli\u003eDesigned for S400 and S300 twin turbos\u003c\/li\u003e\n\u003cli\u003eBlack ceramic finish adds a sleek look\u003c\/li\u003e\n\u003cli\u003eIdeal for compound turbo setups\u003c\/li\u003e\n\u003cli\u003eAll-in-one kit for easy installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eMake Room For More Power Without The Guesswork\u003c\/h4\u003e\n\u003cp\u003eIf you’re serious about squeezing more performance out of your 5.9L Cummins build, every part of your turbo setup needs to be dialed in. The Wehrli 1 Inch T4 Ceramic Spacer Plate Kit gives you that extra bit of clearance you need when running a compound turbo setup, and it does it without any hassle. Whether you're dealing with a tight manifold space or just want a better angle for fitment, this kit offers a clean and efficient solution. It’s a small change that can make a big difference when you're fine-tuning airflow and boost response. With a ceramic-coated finish and high-strength steel construction, it doesn’t just perform—it also looks right at home under the hood. You’ll get everything you need in one package, including M10 studs, nuts, and two T4 gaskets, so you’re not scrambling for parts mid-install. 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By creating additional space between the manifold and turbo, this plate helps with hardware clearance, thermal management, and overall install flexibility. 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The Wehrli 3-Inch V-Band Style Down Pipe is a simple yet powerful upgrade that completely transforms how your truck breathes and responds. By opening up the exhaust path with a full 3-inch diameter, you’re allowing your turbo to spool quicker and more efficiently, which translates to better throttle response and cooler exhaust temps. Whether you’re towing heavy, daily driving, or tuned for performance, this down pipe delivers noticeable gains without a complicated install. It’s designed to fit trucks running a 2011–2015 style V-band exhaust, making it ideal for anyone ditching the limitations of the stock system. You’ll notice a deeper, cleaner exhaust note too, one that actually sounds like the power you're making. It's a must-have for drivers who want their truck to run smoother, sound better, and pull harder.\u003c\/p\u003e\n\u003ch4\u003eBuilt To Match Factory Fit With Performance In Mind\u003c\/h4\u003e\n\u003cp\u003eThe Wehrli 100121 3-Inch V-Band Down Pipe is precision-engineered for the 2011–2015 GM Silverado and Sierra 2500HD\/3500HD trucks equipped with the 6.6L Duramax LML. Crafted from high-quality stainless steel, this down pipe replaces the restrictive factory version with a mandrel-bent 3-inch alternative that significantly improves exhaust flow. It’s compatible with factory turbos and drop-in replacements, giving you flexibility in how you build your truck. This version uses a V-band style flange that aligns with 2011–2015 exhaust configurations, so if you’re running a 2015.5 or newer system with a 3-bolt flange, you’ll either need an earlier-style exhaust or Wehrli’s alternate flange model. The V-band design ensures a reliable, leak-resistant seal and simplifies installation with a clean, secure fit. This down pipe is an ideal choice for those upgrading airflow to support tuning or reduce backpressure in high-demand driving. It’s a functional, well-built solution that balances performance gains with a factory-like install experience.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment: \u003c\/strong\u003e 2011, 2012, 2013, 2014, 2015 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LML\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplaces factory crushed down pipe for better flow\u003c\/li\u003e\n\u003cli\u003eCompatible with factory or drop-in style turbos\u003c\/li\u003e\n\u003cli\u003eDesigned for 2011–2015 V-band style exhaust systems\u003c\/li\u003e\n\u003cli\u003eWill not fit 2015.5+ trucks with 3-bolt flange exhaust\u003c\/li\u003e\n\u003cli\u003e2015.5+ trucks must convert to earlier style exhaust\u003c\/li\u003e\n\u003cli\u003eAlternatively, use Wehrli part number WCF100705 for 3-bolt systems\u003c\/li\u003e\n\u003cli\u003eV-band flange design offers a tight, leak-free seal\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended for best fitment\u003c\/li\u003e\n\u003cli\u003eIntended for off-road or performance applications\u003c\/li\u003e\n\u003cli\u003eNot CARB approved, check emissions regulations locally\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527028220188,"sku":"WCF100121","price":227.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100121.jpg?v=1722363041"},{"product_id":"wehrli-100473-intake-resonator-delete-plug-17-21-gm-6-6l-duramax-l5p-black-anodized","title":"Wehrli 100473 Black Anodized Intake Resonator Delete Plug | 2017-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDeletes factory intake resonator\u003c\/li\u003e\n\u003cli\u003eImproves turbo sound\u003c\/li\u003e\n\u003cli\u003eCleans up engine bay appearance\u003c\/li\u003e\n\u003cli\u003eCNC machined from 6061 aluminum\u003c\/li\u003e\n\u003cli\u003eBlack anodized finish\u003c\/li\u003e\n\u003cli\u003eQuick and easy installation\u003c\/li\u003e\n\u003cli\u003eNo tuning required\u003c\/li\u003e\n\u003cli\u003eFits stock trucks with no mods\u003c\/li\u003e\n\u003cli\u003eEmissions and warranty friendly\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eClean Up Your Engine Bay with Wehrli\u003c\/h4\u003e\n\u003cp\u003eIf you’ve ever popped the hood on your L5P Duramax and wondered why there’s a big, clunky plastic box connected to the intake, you’re not alone. That piece is the factory resonator, and while it’s there to quiet down turbo noise, it’s not doing you any favors in terms of performance or looks. The Wehrli Black Anodized Intake Resonator Delete Plug is a simple, clean solution that lets you get rid of that bulky resonator and replace it with a sleek, billet aluminum plug that takes just minutes to install. Once you remove the factory resonator, you immediately notice how much cleaner and more open your engine bay looks. The Wehrli plug slides right into place, sealing off the opening left behind with precision fitment and a smooth, flush look. It’s CNC machined from 6061 aluminum, so it's built to last and hold up to heat, vibration, and pressure, everything you’d expect under the hood of a heavy-duty diesel.\u003c\/p\u003e\n\u003ch4\u003eBlack Anodized Finish with Hassle-Free Install\u003c\/h4\u003e\n\u003cp\u003eThe black anodized finish adds a clean, low-profile appearance that blends in with the rest of the engine bay. It’s also laser-engraved with the Wehrli logo, so you get that subtle touch of custom styling without anything flashy or overdone. More importantly, once the resonator is gone, you’ll hear a more pronounced and aggressive turbo whistle, which is a big part of the appeal for diesel owners who like to hear their truck working. Better yet, this mod won’t affect emissions, it doesn’t require any tuning, and it’s completely reversible if you ever want to go back to stock. 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