{"title":"2020-2026 GM 2500HD\/3500HD 6.6L L5P Duramax Manifolds \u0026 Up-Pipes","description":"\u003cdiv\u003e\n\u003cinput type=\"checkbox\" class=\"read-more-state\" id=\"post-1\"\u003e\n\u003cp class=\"read-more-wrap\"\u003eUpgrading to aftermarket manifolds and up-pipes on your 2020-2026 GM 6.6L Duramax L5P is a great way to unlock additional power and performance. These high-quality up-pipes replace the restrictive factory components, providing improved exhaust flow and reduced backpressure. The result is lower Exhaust Gas Temperatures (EGTs) and a significant boost in both horsepower and torque for your GM 2500HD\/3500HD.\u003cspan class=\"read-more-target\"\u003e \u003cspan class=\"headerspam\"\u003e\u003cstrong\u003eGM Duramax Fitments:\u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM 6.6L Duramax.\u003c\/span\u003e \u003cspan class=\"headerspam\"\u003e\u003cstrong\u003eSubmodel Fitments:\u003c\/strong\u003e WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali.\u003c\/span\u003e \u003cspan class=\"headerspam\"\u003eSome exceptions apply, please see individual product pages for specific fitments.\u003c\/span\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003clabel for=\"post-1\" class=\"read-more-trigger\"\u003e\u003c\/label\u003e\n\u003c\/div\u003e","products":[{"product_id":"ppe-116122000-oem-length-replacement-high-flow-up-pipes-17-21-gm-6-6l-duramax","title":"PPE 116122000 OEM Length Replacement High Flow Up-Pipes | 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\u003eDirect bolt-on replacement for factory pipes\u003c\/li\u003e\n\u003cli\u003e46% larger flow area than stock\u003c\/li\u003e\n\u003cli\u003eMade from 11-gauge 304 stainless steel\u003c\/li\u003e\n\u003cli\u003eInternally sleeved stainless steel bellows\u003c\/li\u003e\n\u003cli\u003eHandles high temperature and pressure\u003c\/li\u003e\n\u003cli\u003eIncludes 301 stainless steel gaskets\u003c\/li\u003e\n\u003cli\u003eImproves turbo spool and exhaust efficiency\u003c\/li\u003e\n\u003cli\u003eDurable, long-lasting construction\u003c\/li\u003e\n\u003cli\u003eCompatible with stock exhaust manifolds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePremium Up-Pipe Replacement Kit for GM 6.6L Duramax\u003c\/h4\u003e\n\u003cp\u003eIf your factory up-pipes are showing signs of fatigue or you’re just ready for something that flows better and lasts longer, the PPE OEM-Length Replacement High Flow Up-Pipes are a smart move. Designed specifically for 2017–2025 Silverado and Sierra 2500HD\/3500HD trucks with the 6.6L Duramax, this kit gives you a direct bolt-on upgrade with real performance benefits, without having to rework the rest of your setup. What sets these apart is the increased flow. PPE designed these pipes with a 46% larger flow area compared to stock. That added volume helps your turbo spool quicker, reduces exhaust backpressure, and contributes to cooler exhaust gas temperatures. Whether you’re towing heavy, running hard, or just want to give your truck a bit more breathing room, that difference in flow can have a noticeable impact.\u003c\/p\u003e\n\u003ch4\u003e304 Stainless Steel Construction with True OEM Fit\u003c\/h4\u003e\n\u003cp\u003eDurability is a major focus here. The up-pipes are built from 11-gauge 304 stainless steel, a tough material that holds up well under heat and stress. PPE also equips them with internally sleeved stainless steel bellows. These are built to flex with your engine’s movement while standing up to the kind of temperature swings and pressure spikes that would wear out stock components over time. Even better, this is a true OEM-length replacement. It bolts directly to your factory exhaust manifolds and turbo connection points without modification. The kit even includes high-quality 301 stainless steel gaskets, so you’re not stuck reusing old, worn-out seals during install. It’s a hassle-free way to get better performance and longer-lasting reliability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 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 2017–2025 Chevy Silverado and GMC Sierra 6.6L L5P\u003c\/li\u003e\n\u003cli\u003eDirect OEM-length replacement, bolts on with no mods\u003c\/li\u003e\n\u003cli\u003e46% larger flow area than restrictive factory pipes\u003c\/li\u003e\n\u003cli\u003eConstructed from heavy-duty 11-gauge 304 stainless steel\u003c\/li\u003e\n\u003cli\u003eInternally sleeved bellows handle engine flex and stress\u003c\/li\u003e\n\u003cli\u003eWithstands extreme exhaust heat and high pressure\u003c\/li\u003e\n\u003cli\u003eIncludes new 301 stainless steel gaskets for sealing\u003c\/li\u003e\n\u003cli\u003eImproves turbo spool, lowers EGTs, reduces backpressure\u003c\/li\u003e\n\u003cli\u003eCompatible with factory exhaust manifolds and turbo\u003c\/li\u003e\n\u003cli\u003eBuilt for long-term durability and reliable performance\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49526956720412,"sku":"PPE116122000","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/116122000_oem_length_up-pipes_l5p_1__90634.jpg?v=1722359481"},{"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-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":"ppe-116112520-high-flow-exhaust-manifolds-and-up-pipes-package-black-17-22-gm-66l-duramax","title":"PPE 116112520 High Flow Black Exhaust Manifolds \u0026 Up-Pipes Package | 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\u003eHigh-flow cast iron exhaust manifolds\u003c\/li\u003e\n\u003cli\u003e304 stainless steel internally sleeved up-pipes\u003c\/li\u003e\n\u003cli\u003eIncreased inner diameter for better flow\u003c\/li\u003e\n\u003cli\u003eLowers exhaust gas temperatures (EGTs)\u003c\/li\u003e\n\u003cli\u003eImproves turbo spool-up and throttle response\u003c\/li\u003e\n\u003cli\u003eOptional ceramic coating for heat protection\u003c\/li\u003e\n\u003cli\u003eEnhances power and fuel efficiency\u003c\/li\u003e\n\u003cli\u003eResists corrosion from moisture and road salt\u003c\/li\u003e\n\u003cli\u003eDesigned for long-lasting durability and strength\u003c\/li\u003e\n\u003cli\u003eProven performance in high-temp environments\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on fit with no tuning required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eMajor Exhaust System Upgrade for GM 6.6L Duramax\u003c\/h4\u003e\n\u003cp\u003eIf you're building power with your L5P Duramax or just trying to get the most out of your stock setup, the PPE High Flow Exhaust Manifolds \u0026amp; Up-Pipes Package is a serious upgrade worth looking into. Designed for 2017–2025 Silverado and Sierra 2500HD\/3500HD trucks with the 6.6L Duramax, this kit is all about increasing exhaust flow, improving efficiency, and keeping EGTs in check, especially under load. The manifolds are cast from high-silicon moly iron, which is a tried-and-true material known for its strength and heat resistance. They’re built to flow better than stock, reducing restriction and helping your turbo spool faster. If you tow heavy, push your truck hard, or just want it to breathe easier, this change alone makes a noticeable difference.\u003c\/p\u003e\n\u003ch4\u003eDeveloped for High-Performance Applications\u003c\/h4\u003e\n\u003cp\u003ePaired with the manifolds are PPE’s upgraded up-pipes, which feature internally sleeved bellows made from aircraft-grade 304 stainless steel. These aren't just stronger, they're built with a larger inner diameter to move more exhaust gas with less turbulence. The result is lower exhaust gas temperatures and improved reliability, even during sustained high-load situations like towing up long grades or climbing in hot weather. One of the standout features of this package is the black ceramic coating. Originally developed for military and motorsport applications, ceramic coating provides a thermal barrier that helps keep heat inside the exhaust path, instead of radiating out into the engine bay. That means lower underhood temps, improved thermal efficiency, and added protection against corrosion, moisture, and chemicals. Plus, it keeps the parts looking good for the long haul.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 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 2017–2025 Chevy Silverado and GMC Sierra 6.6L L5P\u003c\/li\u003e\n\u003cli\u003eCast from high-silicon moly iron for strength\u003c\/li\u003e\n\u003cli\u003eUp-pipes use 304 stainless steel sleeved bellows\u003c\/li\u003e\n\u003cli\u003eLarger inner diameter improves exhaust gas flow\u003c\/li\u003e\n\u003cli\u003eLowers exhaust gas temperatures and reduces backpressure\u003c\/li\u003e\n\u003cli\u003eOptional ceramic coating helps control heat and corrosion\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on design works with factory turbo setup\u003c\/li\u003e\n\u003cli\u003eSold as a complete manifold and up-pipe package\u003c\/li\u003e\n\u003cli\u003e50-state emissions legal with CARB EO approval\u003c\/li\u003e\n\u003cli\u003eBacked by a 3-year limited manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527183016220,"sku":"PPE116112520","price":1520.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/116112520_1.jpg?v=1722359463"},{"product_id":"ppe-116112500-high-flow-raw-exhaust-manifolds-up-pipes-package-17-22-gm-6-6l-duramax","title":"PPE 116112500HD High Flow Raw Exhaust Manifolds \u0026 Up-Pipes Package | 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\u003eHigh-sil moly cast exhaust manifolds\u003c\/li\u003e\n\u003cli\u003eInternally sleeved 304 stainless up-pipes\u003c\/li\u003e\n\u003cli\u003eIncreased flow for better turbo spool\u003c\/li\u003e\n\u003cli\u003eReduces exhaust gas temperatures (EGTs)\u003c\/li\u003e\n\u003cli\u003eBoosts power, throttle response, and MPG\u003c\/li\u003e\n\u003cli\u003eRaw finish adds an aggressive appeal\u003c\/li\u003e\n\u003cli\u003eImproves exhaust efficiency under load\u003c\/li\u003e\n\u003cli\u003eBuilt for long-term durability and strength\u003c\/li\u003e\n\u003cli\u003eDirect-fit design for easy installation\u003c\/li\u003e\n\u003cli\u003eCompatible with most L5P Duramax trucks\u003c\/li\u003e\n\u003cli\u003eIncludes both manifolds and up-pipes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDurable Manifold and Up-Pipe Package for GM Duramax\u003c\/h4\u003e\n\u003cp\u003eIf your L5P Duramax is still breathing through stock manifolds and up-pipes, there’s power on the table you haven’t tapped into yet. The PPE High Flow Raw Exhaust Manifolds \u0026amp; Up-Pipes Package is a purpose-built upgrade for serious truck owners who want more response, lower EGTs, and rock-solid reliability, without diving into extensive modifications. This kit ditches the restrictive factory setup in favor of high-sil moly cast manifolds and internally sleeved 304 stainless steel up-pipes. These aren't just stronger, they’re built to move exhaust gases faster and more efficiently, helping your turbo spool quicker while keeping exhaust gas temperatures in check under load. Whether you're towing, hauling, or just looking to squeeze more performance from your daily driver, you’ll feel the difference in both throttle response and driveability.\u003c\/p\u003e\n\u003ch4\u003eDirect Replacement Upgrade\u003c\/h4\u003e\n\u003cp\u003eThe raw finish on the manifolds gives this setup a no-nonsense, aggressive look that complements the rugged aesthetic of any HD build. It’s not coated or polished, it’s a raw, work-ready finish that tells the world your truck is built for performance over polish. And behind that industrial vibe is the kind of strength and heat resistance that keeps your truck running cooler and cleaner through heavy use. Designed as a direct-fit replacement, this PPE manifold and up-pipe package bolts up to most L5P Duramax platforms with minimal hassle. It comes with everything you need for installation, and no tuning is required, just bolt it on and go. The fitment is dialed in, and PPE’s reputation for precision machining and material quality means you can trust it to hold up, mile after mile.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 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 2017–2025 Chevy Silverado and GMC Sierra 6.6L L5P\u003c\/li\u003e\n\u003cli\u003eHigh-silicon moly cast manifolds built for strength\u003c\/li\u003e\n\u003cli\u003eUp-pipes feature internally sleeved 304 stainless bellows\u003c\/li\u003e\n\u003cli\u003eLarger diameter design increases exhaust flow capacity\u003c\/li\u003e\n\u003cli\u003eHelps reduce EGTs and lower backpressure under load\u003c\/li\u003e\n\u003cli\u003eImproves turbo spool, throttle response, and fuel efficiency\u003c\/li\u003e\n\u003cli\u003eOptional ceramic coating adds thermal and corrosion protection\u003c\/li\u003e\n\u003cli\u003eRaw finish provides a rugged, aggressive appearance\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation with included gaskets and hardware\u003c\/li\u003e\n\u003cli\u003eCompatible with factory turbo and manifold connections\u003c\/li\u003e\n\u003cli\u003e50-state emissions legal with CARB EO approval\u003c\/li\u003e\n\u003cli\u003eBacked by a 3-year limited manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527183048988,"sku":"PPE116112500","price":1349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/116112500_20_1.jpg?v=1722359457"},{"product_id":"ppe-116112535-high-flow-silver-ceamic-exhaust-manifolds-up-pipes-package-17-22-gm-6-6l-duramax","title":"PPE 116112535 High Flow Silver Ceamic Exhaust Manifolds \u0026 Up-Pipes Package | 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\u003eHigh-sil moly cast exhaust manifolds\u003c\/li\u003e\n\u003cli\u003eInternally sleeved 304 stainless up-pipes\u003c\/li\u003e\n\u003cli\u003eIncreased flow for better turbo spool\u003c\/li\u003e\n\u003cli\u003eReduces exhaust gas temperatures (EGTs)\u003c\/li\u003e\n\u003cli\u003eBoosts power, throttle response, and MPG\u003c\/li\u003e\n\u003cli\u003eSilver ceramic coating reduces heat soak\u003c\/li\u003e\n\u003cli\u003eProtects against corrosion and road salt\u003c\/li\u003e\n\u003cli\u003eImproves exhaust efficiency under load\u003c\/li\u003e\n\u003cli\u003eBuilt for long-term durability and strength\u003c\/li\u003e\n\u003cli\u003eDirect-fit design for easy installation\u003c\/li\u003e\n\u003cli\u003eCompatible with most L5P Duramax trucks\u003c\/li\u003e\n\u003cli\u003eIncludes both manifolds and up-pipes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePremium Manifold and Up-Pipe Package for GM 6.6L Duramax\u003c\/h4\u003e\n\u003cp\u003eIf you're looking to pull more performance out of your L5P Duramax without compromising reliability, the PPE High Flow Silver Ceramic Exhaust Manifolds \u0026amp; Up-Pipes Package is one of the smartest upgrades you can bolt on. This setup replaces the restrictive factory cast components with free-flowing manifolds and internally sleeved stainless steel up-pipes, designed from the ground up to improve flow, reduce exhaust gas temps, and help your turbo spool faster and harder. At the heart of this system are high-sil moly cast manifolds, engineered for strength, precision, and consistent performance under high heat and heavy load. They're matched with aircraft-grade 304 stainless up-pipes that feature internally sleeved bellows for added durability and longevity. These components aren't just built tough, they're built to move exhaust gases more efficiently, giving your turbo what it needs, when it needs it.\u003c\/p\u003e\n\u003ch4\u003eHigh-Quality Construction \u0026amp; Design\u003c\/h4\u003e\n\u003cp\u003eWhat really sets this kit apart is the silver ceramic coating. More than just good looks, this coating acts as a thermal barrier, minimizing heat soak into the engine bay and preserving exhaust velocity. That means lower EGTs and better overall efficiency, especially when you're towing, climbing grades, or running the truck hard off-road. The ceramic finish also holds up incredibly well against corrosion, road salt, fuel residue, and extreme weather, keeping everything looking clean and performing strong for years to come. Installation is straightforward thanks to the direct-fit design. Everything you need to mount the manifolds to the cylinder heads is included, right down to new gaskets, ARP 12-point fasteners, and assembly lube. Up-pipe hardware is sold separately if you're pairing with PPE’s high-flow downpipe or running your own configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 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 2017–2025 Chevy Silverado and GMC Sierra 6.6L L5P\u003c\/li\u003e\n\u003cli\u003eHigh-sil moly cast manifolds built for strength\u003c\/li\u003e\n\u003cli\u003e304 stainless up-pipes with internally sleeved bellows\u003c\/li\u003e\n\u003cli\u003eLarger flow area improves turbo spool and efficiency\u003c\/li\u003e\n\u003cli\u003eHelps reduce EGTs and exhaust backpressure under load\u003c\/li\u003e\n\u003cli\u003eSilver ceramic coating controls heat and resists corrosion\u003c\/li\u003e\n\u003cli\u003eProtects against road salt, chemicals, and moisture\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on install with factory manifold and turbo\u003c\/li\u003e\n\u003cli\u003eKit includes both manifolds and up-pipes\u003c\/li\u003e\n\u003cli\u003e50-state emissions legal with CARB EO approval\u003c\/li\u003e\n\u003cli\u003eAvailable in raw or ceramic-coated finish options\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527183147292,"sku":"PPE116112535","price":1520.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/116112535_20_1.jpg?v=1722359463"},{"product_id":"17-22-gm-25003500hd-66l-duramax-l5p-billet-exhaust-manifolds","title":"Wehrli 100373 Billet Exhaust Manifolds | 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\u003eHigh-flow billet steel construction\u003c\/li\u003e\n\u003cli\u003eFinished in black ceramic coating\u003c\/li\u003e\n\u003cli\u003eFully TIG welded for long-term durability\u003c\/li\u003e\n\u003cli\u003eGasket-matched exhaust ports for better flow\u003c\/li\u003e\n\u003cli\u003eImproves turbo spool and lowers EGTs\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM and ported heads\u003c\/li\u003e\n\u003cli\u003eWorks with OEM-style up pipes\u003c\/li\u003e\n\u003cli\u003e1\/8 NPT port for sensors included\u003c\/li\u003e\n\u003cli\u003eIncludes ARP 12PT fasteners\u003c\/li\u003e\n\u003cli\u003eNo tuning required after install\u003c\/li\u003e\n\u003cli\u003eCompatible with 2019-2026 L5D medium duty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHigh-Quality Exhaust Manifold Upgrade for Medium-Duty Duramax\u003c\/h4\u003e\n\u003cp\u003eIf you're looking to squeeze more power and efficiency out of your L5P Duramax without diving into complicated tuning or custom fabrication, Wehrli’s Billet Exhaust Manifolds are a serious upgrade worth considering. These aren’t your average cast iron replacements, they're fully TIG-welded and CNC-machined from billet steel, built with performance and durability in mind right from the start. The design is gasket-matched at the exhaust ports and internally divided, so you're getting smooth, optimized flow whether you're running stock or ported cylinder heads. That means better turbo spool-up, lower EGTs, and a noticeable improvement in throttle response, especially if you pair them with Wehrli’s 2-inch stainless high-flow up pipes.\u003c\/p\u003e\n\u003ch4\u003ePremium Construction \u0026amp; Design\u003c\/h4\u003e\n\u003cp\u003eWhat really sets these manifolds apart is their build quality. They're finished in a sleek black ceramic coating that's rated up to 1800°F, which not only looks clean under the hood but also helps manage heat over time. Wehrli even includes everything you need for a clean install, new gaskets, ARP 12-point fasteners, washers, and assembly lube. There's also a 1\/8\" NPT port pre-threaded into the driver-side manifold, giving you an easy option to add an EGT or drive pressure sensor. These manifolds are designed as direct replacements, so they work with OEM-style up pipes and require no tuning after installation. They’re also compatible with 2019-2026 L5D Duramax medium-duty trucks, so if you’re running a 4500\/5500\/6500 chassis, you’re covered.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 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 2017–2026 L5P and 2019–2026 L5D Duramax engines\u003c\/li\u003e\n\u003cli\u003eCNC-machined billet steel with high-flow design\u003c\/li\u003e\n\u003cli\u003eBlack ceramic coating rated up to 1800°F\u003c\/li\u003e\n\u003cli\u003eFully TIG welded for maximum durability\u003c\/li\u003e\n\u003cli\u003eGasket-matched ports improve exhaust flow\u003c\/li\u003e\n\u003cli\u003eHelps turbo spool faster and lowers EGTs\u003c\/li\u003e\n\u003cli\u003eWorks with OEM or ported cylinder heads\u003c\/li\u003e\n\u003cli\u003eCompatible with factory-style up-pipes\u003c\/li\u003e\n\u003cli\u003eDriver-side manifold includes 1\/8\" NPT sensor port\u003c\/li\u003e\n\u003cli\u003eComes with ARP 12-point fasteners and washers\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on install, no tuning required\u003c\/li\u003e\n\u003cli\u003eNot emissions legal for sale in California\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527194878236,"sku":"WCF100373","price":1570.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100373_20_1.jpg?v=1722345867"},{"product_id":"17-22-gm-25003500hd-66l-duramax-l5p-ppe-stainless-steel-up-pipe-gasket-set-118062050","title":"PPE 118062050 Stainless Steel Up-Pipe Gasket Set | 2017-2025 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\u003eReplaces leaking or worn factory gaskets\u003c\/li\u003e\n\u003cli\u003eMade from multi-layered 301 stainless steel\u003c\/li\u003e\n\u003cli\u003eRolled edge design for a tighter seal\u003c\/li\u003e\n\u003cli\u003eWithstands extreme temperature fluctuations\u003c\/li\u003e\n\u003cli\u003eCompatible with stock and aftermarket up-pipes\u003c\/li\u003e\n\u003cli\u003eImproves sealing between turbo and manifold\u003c\/li\u003e\n\u003cli\u003eHelps prevent boost loss and exhaust leaks\u003c\/li\u003e\n\u003cli\u003eDurable construction for long-term reliability\u003c\/li\u003e\n\u003cli\u003eSold as a complete set of four gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eEnsure a Leak-Free Seal with PPE\u003c\/h4\u003e\n\u003cp\u003eIf you're chasing down an exhaust leak on your L5P Duramax, there’s a good chance your up-pipe gaskets are the culprit. The PPE Stainless Steel Up-Pipe Gasket Set is a smart, long-term fix that not only solves the problem, it’s an upgrade over the stock components in every way. Whether you're doing a repair or installing new up-pipes, these gaskets are designed to hold up under the kind of heat and pressure your Duramax sees on a regular basis. This set is made specifically for 2017–2025 Silverado and Sierra 2500HD\/3500HD trucks with the 6.6L L5P. It includes four gaskets total, everything you need for a full replacement. PPE uses multi-layered 301 stainless steel, which is far more durable than the standard material found in factory gaskets. That layered design, combined with a rolled edge, creates a tighter, more consistent seal between the manifold and turbo inlet.\u003c\/p\u003e\n\u003ch4\u003eBuilt to Handle Extreme Stress\u003c\/h4\u003e\n\u003cp\u003eWhere the factory gaskets tend to break down over time, especially under high heat, towing loads, or performance upgrades, these PPE gaskets are built to take that kind of abuse. They handle the extreme temperature swings of a diesel engine without warping or failing, which helps prevent future leaks and the headaches that come with them. Another big plus is that these gaskets work with both stock and aftermarket up-pipes. So whether you’re staying OEM or installing a high-flow setup, you won’t have to worry about compatibility. And since they’re a direct fit, installation is straightforward, no weird trimming or modifying to make things work.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 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 2017–2025 Chevy Silverado and GMC Sierra 6.6L L5P\u003c\/li\u003e\n\u003cli\u003eSet includes four up-pipe gaskets for full replacement\u003c\/li\u003e\n\u003cli\u003eMade from multi-layered 301 stainless steel\u003c\/li\u003e\n\u003cli\u003eRolled edge design ensures a tight, consistent seal\u003c\/li\u003e\n\u003cli\u003eDirect replacement for worn or leaking factory gaskets\u003c\/li\u003e\n\u003cli\u003eHandles extreme diesel engine heat and pressure\u003c\/li\u003e\n\u003cli\u003ePrevents exhaust leaks and loss of turbo boost\u003c\/li\u003e\n\u003cli\u003eWorks with stock and aftermarket up-pipe systems\u003c\/li\u003e\n\u003cli\u003eBuilt for long-term durability and reliability\u003c\/li\u003e\n\u003cli\u003eEasy install with no trimming or modification needed\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527209197852,"sku":"PPE118062050","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/118062050.jpg?v=1722345868"},{"product_id":"ppe-116122010-oem-replacement-up-pipe-for-oem-exhaust-manifolds-17-22-gm-6-6l-duramax-l5p","title":"PPE 116122010 OEM Replacement Up-Pipe for OEM Exhaust Manifolds | 2017-2025 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\u003eLowers Exhaust Gas Temperatures\u003c\/li\u003e\n\u003cli\u003e53% greater flow over stock\u003c\/li\u003e\n\u003cli\u003e2-Inch Passenger side Up-Pipes\u003c\/li\u003e\n\u003cli\u003eReduces exhaust back-pressure\u003c\/li\u003e\n\u003cli\u003eStainless steel inner line bellows\u003c\/li\u003e\n\u003cli\u003eStainless steel 11 gauge .120\" Wall tubing\u003c\/li\u003e\n\u003cli\u003eDirect-fit replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAllow your Diesel Engine to Breathe Easier for Performance Boosts\u003c\/h4\u003e\n\u003cp\u003eThe factory up-pipe on your 2017-2025 Duramax 6.6L L5P truck isn't anything to write home about, so we recommend replacing it with the premium PPE High-Flow Up-Pipe for an impressive increase in both power and performance. Up-pipes allow your diesel engine to breath easier and run more efficiently by greatly reducing the Exhaust Gas Temperatures which results in a boost of horsepower and torque. This particular system outflows your stock system by 53%, giving you more confidence whether you're challenging new terrain or passing somebody on the highway. This system works by reducing your rig's exhaust back-pressure to improve the overall flow of your exhaust system. This kit is perfect for anybody looking to make future modifications on their rig along with those who just need some improved engine performance.\u003c\/p\u003e\n\u003ch4\u003ePremium Construction \u0026amp; Installation Info\u003c\/h4\u003e\n\u003cp\u003eThe PPE Passenger Side High Flow Up-Pipe was crafted to handle just about anything you throw at it. The up-pipe features 11-gauge 304 stainless steel construction that exhibits superior strength for all of the more extreme driving situations you and your truck get into. Internally sleeved elbows along with the pipe's .120\" Wall tubing add an additional layer of durability to help resist metal fatigue from high temperatures and pressure fluctuation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax Trucks L5P\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication Note:\u003c\/strong\u003e This up-pipe is a direct fit only for OEM Exhaust Manifold on a 2017-2022 GM 6.6L Duramax L5P.\u003c\/p\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527226040604,"sku":"PPE116122010","price":134.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/116122010.jpg?v=1722359482"},{"product_id":"100226-17-24-gm-66l-duramax-wherli-billet-exhaust-manifold-up-pipe-kit","title":"Wehrli 100226 Billet Exhaust Manifold \u0026 Up Pipe 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\u003eFully TIG welded CNC machined construction\u003c\/li\u003e\n\u003cli\u003eBillet steel exhaust manifolds\u003c\/li\u003e\n\u003cli\u003eBlack ceramic coating finish\u003c\/li\u003e\n\u003cli\u003eIncludes new gaskets\u003c\/li\u003e\n\u003cli\u003eARP 12PT fasteners\u003c\/li\u003e\n\u003cli\u003e1\/8 NPT port for simple installation\u003c\/li\u003e\n\u003cli\u003eDriver and passenger side up pipe\u003c\/li\u003e\n\u003cli\u003eNo tuning required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUpgraded Exhaust Manifolds \u0026amp; Up Pipes for GM 6.6L Duramax\u003c\/h4\u003e\n\u003cp\u003eUnleashing the full power and potential of your 2017-2026 GM 6.6L Duramax equipped truck is going to require some aftermarket modifications. Fortunately, Wehrli Custom Fab offers a great place to start with their Billet Exhaust Manifold and Up Pipe Kit! Both the exhaust manifolds and up pipes featured in this kit were built with smoother bends and larger diameters over stock, helping your engine breathe easier during high-performance applications. With reduced exhaust flow restrictions, you can expect improved turbocharger spool-up times to provide better acceleration and throttle response, especially at lower RPMs. Better exhaust flow also contributes to improved engine efficiency by reducing overall backpressure. This upgrade will also work to lower EGTs during extreme driving conditions, helping protect your critical engine components from excessive heat. The manifolds are exhaust port gasket matched and internally divided for optimal flow with OEM or ported cylinder heads.\u003c\/p\u003e\n\u003ch4\u003ePremium Construction \u0026amp; Installation Info\u003c\/h4\u003e\n\u003cp\u003eWehrli Custom Fab manufactured their Billet Exhaust Manifold Up Pipe kit using only the best materials to ensure unmatched strength and reliability on your GM 6.6L Duramax. Each exhaust manifold comes fully TIG welded with CNC machined billet steel construction which makes it tough enough to handle just about any adventure you have in mind. The manifolds are then finished with a black ceramic coating which is rated for an impressive 1800 degrees Fahrenheit. The up pipes feature impressive 2\" diameters and were built from heavy-duty 11 gauge stainless steel to add even more durability to your ride. Wehrli even includes the necessary gaskets, ARP fasteners, and washers required for installation. A 1\/8 NPT port is included in the driver's side manifold for installation of an EGT or drive pressure sensor. The installation process itself can be complete in your garage and requires no tuning after it's complete.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM 6.6L Duramax L5P\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWill fit on stock trucks, no other modifications or upgrades necessary\u003c\/li\u003e\n\u003cli\u003eAlso fits 2019+ L5D Duramax (4500\/5500\/6500 ) Medium Duty Trucks.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527332176156,"sku":"WCF100226","price":2158.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/F221299930.jpg?v=1764115518"},{"product_id":"ppe-118062012-standard-port-stainless-steel-exhaust-manifold-set-17-24-gm-66l-duramax","title":"PPE 118062012 Standard Port Stainless Steel Exhaust Manifold Set | 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\u003eFits 2017–2025 6.6L Duramax engines\u003c\/li\u003e\n\u003cli\u003eIncludes three-piece stainless manifold set\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM and PPE manifolds\u003c\/li\u003e\n\u003cli\u003eMulti-layered 301 stainless steel gaskets\u003c\/li\u003e\n\u003cli\u003eCreates a tight, reliable exhaust seal\u003c\/li\u003e\n\u003cli\u003eResistant to extreme heat and wear\u003c\/li\u003e\n\u003cli\u003eFeatures molybdenum dry coating for durability\u003c\/li\u003e\n\u003cli\u003eBacked by a one-year limited warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eReliable Sealing and Durability for Your Duramax\u003c\/h4\u003e\n\u003cp\u003eIf you're replacing exhaust manifolds or upgrading to PPE high-flow units on your 2017-2025 Duramax, the PPE 118062012 Standard Port Stainless Steel Exhaust Manifold Set is a must-have for long-lasting performance. This three-piece set includes multi-layered 301 stainless steel gaskets designed to create a tight, dependable seal between the exhaust manifolds and the cylinder head. Whether you're running stock manifolds or PPE's performance versions, this gasket set is built to fit and function without compromise. The design handles high pressure and repeated thermal cycling, which means less risk of leaks and long-term issues as your truck racks up miles.\u003c\/p\u003e\n\u003ch4\u003eEngineered to Handle Heat and Hold Strong\u003c\/h4\u003e\n\u003cp\u003eEach gasket in the kit features a molybdenum dry coating that adds wear resistance and helps it endure the extreme temperatures produced in heavy-duty diesel applications. This isn’t just a simple replacement part, it's an upgrade in sealing performance and material quality. Ideal for daily-driven work trucks and modified builds alike, the PPE manifold set provides the durability and reliability needed in harsh environments. Installation is straightforward, and once installed, you’ll have the peace of mind that comes from using components engineered to perform under pressure. 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