{"title":"2020-2025 GM 2500HD\/3500HD 6.6L L5P Duramax Radiators \u0026 Cooling Upgrades","description":"\u003cdiv\u003e\n\u003cinput type=\"checkbox\" class=\"read-more-state\" id=\"post-1\"\u003e\n\u003cp class=\"read-more-wrap\"\u003eDuring demanding applications such as towing or off-roading, the 2020-2025 6.6L Duramax L5P engines can run hot, leading to potential issues and performance setbacks down the line. Our selection of premium cooling upgrades for the GM Sierra\/Silverado 2500HD\/3500HD is designed to keep engine temperatures in check, ensuring your engine runs at its best even when you're out pushing things to the limit. Choose from high-performance radiators to enhance cooling efficiency or consider a deep engine oil pan to dissipate heat faster over stock. And be sure to also check out our inventory of \u003ca href=\"2020-2022-gm-duramax-l5p-cold-air-intake-kits\" title=\"2020-2024 GM 2500HD\/3500HD 6.6L L5P Duramax Cold Air Intakes\" rel=\"noopener\" target=\"_blank\"\u003eCold Air Intakes\u003c\/a\u003e \u0026amp; \u003ca href=\"2020-2024-gm-duramax-66l-l5p-intercoolers\" title=\"2020-2024 GM 2500HD\/3500HD 6.6L L5P Duramax Intercoolers\" rel=\"noopener\" target=\"_blank\"\u003eIntercooler Upgrades\u003c\/a\u003e for even more ways to improve performance!\u003cspan class=\"read-more-target\"\u003e \u003cspan class=\"headerspam\"\u003e\u003cstrong\u003eGM Duramax Fitments:\u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025 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-fpe-tl-lbz-lmm-allison-transmission-cooler-lines-06-10-gm-6-6l-duramax-lbz-lmm","title":"PPE 119000820 Billet Coolant Block Off Plate | 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\u003eDurable thicker than OEM design\u003c\/li\u003e\n\u003cli\u003eLeak-resistant O-ring face seal\u003c\/li\u003e\n\u003cli\u003eHigh-quality Viton O-ring included\u003c\/li\u003e\n\u003cli\u003eImproved sealing over factory gasket\u003c\/li\u003e\n\u003cli\u003eDesigned for long-term reliability\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM plate\u003c\/li\u003e\n\u003cli\u003eUses factory mounting hardware\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant aluminum finish\u003c\/li\u003e\n\u003cli\u003ePrecision fit for Duramax engines\u003c\/li\u003e\n\u003cli\u003eReduces risk of coolant leaks\u003c\/li\u003e\n\u003cli\u003eBuilt for heavy-duty applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUpgrade Your Duramax Cooling System With Confidence And Reliability\u003c\/h4\u003e\n\u003cp\u003eWhen you are dialing in your Duramax, the last thing you want is a weak point hiding in your cooling system. The PPE billet coolant block off plate is designed to eliminate that concern with a stronger and more dependable solution than the factory setup. Instead of relying on a gasket that can wear down and eventually leak, this upgrade uses a precision O-ring seal that holds up over time. You get peace of mind knowing your truck is protected from slow leaks that can turn into bigger problems. Additionally, the billet aluminum construction adds a level of durability that feels right at home on a hard-working 6.6L Duramax. Installation stays simple since it reuses your factory hardware, so you are not stuck hunting for extra parts. Whether you are maintaining your truck or upgrading for long-term reliability, this is a small change that makes a noticeable difference. It is the kind of upgrade that keeps your build clean, dependable, and ready for whatever comes next.\u003c\/p\u003e\n\u003ch4\u003ePrecision Machined Design Built For Long Term Sealing Performance\u003c\/h4\u003e\n\u003cp\u003eAt the core of this PPE block off plate is a CNC machined billet aluminum body that delivers consistent fitment and strength. The increased thickness compared to the OEM plate helps resist warping and maintains proper sealing under varying temperatures. Furthermore, the integrated O-ring face seal design creates a more uniform sealing surface, which reduces the chances of coolant seepage over time. The included Viton O-ring is specifically chosen for its resistance to heat and chemical breakdown, making it ideal for long-term use in demanding engine environments. This design replaces the factory gasket system with a more reliable sealing method that requires less maintenance. What is more, the plate is engineered to install using factory fasteners, ensuring proper alignment without modification. Compatibility across 2001-2026 Silverado and Sierra 2500HD and 3500HD models with the 6.6L Duramax makes it a versatile upgrade. Every detail is focused on improving sealing performance while maintaining straightforward installation and dependable operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \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 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\u003eReplaces failure-prone OEM gasket design\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for Duramax cooling system\u003c\/li\u003e\n\u003cli\u003eRequires reuse of factory mounting hardware\u003c\/li\u003e\n\u003cli\u003eEnsures proper O-ring seating during install\u003c\/li\u003e\n\u003cli\u003eViton O-ring offers superior heat resistance\u003c\/li\u003e\n\u003cli\u003eThicker design improves long-term sealing\u003c\/li\u003e\n\u003cli\u003eIdeal for maintenance or preventative upgrades\u003c\/li\u003e\n\u003cli\u003eNo additional modifications required for install\u003c\/li\u003e\n\u003cli\u003eHelps prevent future coolant seepage issues\u003c\/li\u003e\n\u003cli\u003ePrecision fitment critical for leak prevention\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49526746513692,"sku":"PPE119000820","price":53.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/2001-2024-GM-6.6L-Duramax-Coolant-Block-Off-Plate-Billet-Aluminum-Black-Pacific-Performance-Engineering-753632.webp?v=1776180270"},{"product_id":"fluidampr-830151-performance-damper-20-gm-6-6l-duramax-l5p","title":"Fluidampr 830151 Performance Damper | 2020-2025 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\u003eReduces harmful engine vibration\u003c\/li\u003e\n\u003cli\u003eImproves torque and horsepower\u003c\/li\u003e\n\u003cli\u003eProtects critical internal engine components\u003c\/li\u003e\n\u003cli\u003eHigh-strength CNC machined steel construction\u003c\/li\u003e\n\u003cli\u003eBlack zinc-coated for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eUses durable viscous silicone technology\u003c\/li\u003e\n\u003cli\u003eNo tuning or maintenance required\u003c\/li\u003e\n\u003cli\u003eDirect upgrade over stock balancer\u003c\/li\u003e\n\u003cli\u003eSFI 18.1 certified for safety\u003c\/li\u003e\n\u003cli\u003eIdeal for performance-built engines\u003c\/li\u003e\n\u003cli\u003eHelps extend engine life under load\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAdds More Durability to Your GM 6.6L Duramax\u003c\/h4\u003e\n\u003cp\u003eIf you're adding power to your L5P Duramax or just want better engine protection, upgrading to the Fluidampr Performance Damper is a smart move. This isn’t your average stock balancer, it’s engineered to handle the demands of high-torque diesel engines like the 6.6L Duramax. Whether you’re towing heavy, adding horsepower, or running a performance tune, this damper is built to keep harmful vibrations in check and preserve the life of your internal engine components. The Fluidampr uses a viscous silicone design, meaning it adapts in real-time to control crankshaft torsional vibrations across a broad RPM range. That translates into smoother operation, better power delivery, and less stress on bearings, the crankshaft, and other rotating parts. No tuning or maintenance is needed, it’s a direct bolt-on solution designed for serious reliability.\u003c\/p\u003e\n\u003ch4\u003eBuilt to Last\u003c\/h4\u003e\n\u003cp\u003eBuilt in the USA from high-grade CNC-machined steel, it’s finished in a corrosion-resistant black zinc coating and SFI 18.1 certified for safety. If you've upgraded injectors, turbo components, or the rotating assembly, this damper helps you get the most out of your setup while protecting your investment. Whether you’re daily driving, hauling, or hitting the dyno, the Fluidampr Performance Damper delivers the performance and peace of mind your L5P deserves.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025 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 2020–2025 GM Silverado\/Sierra 2500HD \u0026amp; 3500HD with 6.6L Duramax L5P.\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on upgrade, no tuning or extra parts required.\u003c\/li\u003e\n\u003cli\u003eControls crankshaft vibration to protect engine components.\u003c\/li\u003e\n\u003cli\u003eRecommended for trucks with added power, heavy towing, or performance tunes.\u003c\/li\u003e\n\u003cli\u003eSFI 18.1 certified for safety in high-performance applications.\u003c\/li\u003e\n\u003cli\u003eHelps extend crankshaft, bearing, and rotating assembly life.\u003c\/li\u003e\n\u003cli\u003eMade from CNC-machined steel with black zinc coating for durability.\u003c\/li\u003e\n\u003cli\u003eMaintenance-free viscous silicone design adapts across RPM range.\u003c\/li\u003e\n\u003cli\u003eMade in the USA by Fluidampr for long-term reliability.\u003c\/li\u003e\n\u003cli\u003eIdeal for trucks with upgraded injectors, turbos, or built engines.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fluidampr","offers":[{"title":"Default Title","offer_id":49526980673820,"sku":"FLU830151","price":698.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/0044399_fluidampr-performance-diesel-series-damper-gmcchevy-66l-duramax-2020-2023.jpg?v=1743019155"},{"product_id":"wehrli-wcf100155-billet-coolant-heater-core-firewall-fitting-99-22-gm-gm-66l-duramax","title":"Wehrli 100155 Billet Coolant Heater Core Firewall Fitting | 1999-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplaces failure-prone factory plastic fitting\u003c\/li\u003e\n\u003cli\u003eBillet aluminum construction for durability\u003c\/li\u003e\n\u003cli\u003e5\/8\" hose barb connection\u003c\/li\u003e\n\u003cli\u003eDouble O-ring seal prevents leaks\u003c\/li\u003e\n\u003cli\u003eClear anodized finish resists corrosion\u003c\/li\u003e\n\u003cli\u003eDirect-fit upgrade, no modifications needed\u003c\/li\u003e\n\u003cli\u003eWithstands heat and engine vibration\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eCompatible with GM Part 15032062\u003c\/li\u003e\n\u003cli\u003eAlso replaces Dorman 800-409\u003c\/li\u003e\n\u003cli\u003eImproves long-term reliability\u003c\/li\u003e\n\u003cli\u003eQuick and easy installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAdd More Durability and Reliability to your GM Duramax Engine\u003c\/h4\u003e\n\u003cp\u003eIf you’ve ever dealt with a cracked or leaking plastic coolant fitting, you know how frustrating it can be. The factory heater core firewall fitting on Duramax-equipped GM trucks is a known weak point, and over time, heat and vibration take their toll. That’s where this billet aluminum upgrade from Wehrli Custom Fabrication comes in. Built as a direct replacement for the OEM part, this fitting is machined from high-quality aluminum and designed to hold up far better than the stock plastic piece. It features a 5\/8\" hose barb and double O-ring seal to help eliminate leaks, even under long-term heat cycles and engine vibration. The clear anodized finish adds corrosion resistance, giving it a clean, long-lasting appearance that’s built to handle the elements.\u003c\/p\u003e\n\u003ch4\u003eSimple Install\u003c\/h4\u003e\n\u003cp\u003eInstallation is straightforward and doesn’t require any special tools or permanent modifications. Whether you’re doing preventative maintenance or replacing a fitting that’s already failed, this is a simple upgrade that brings real peace of mind. It fits a wide range of GM trucks from 1999 to 2025, including both Silverado and Sierra 2500HD\/3500HD models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\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 GM Sierra\/Silverado 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement for failure-prone factory plastic fitting\u003c\/li\u003e\n\u003cli\u003eCompatible with GM Part #15032062 and Dorman #800-409\u003c\/li\u003e\n\u003cli\u003eFits 1999–2025 GM Silverado and Sierra 2500HD\/3500HD\u003c\/li\u003e\n\u003cli\u003eMachined from billet aluminum for long-term durability\u003c\/li\u003e\n\u003cli\u003e5\/8\" hose barb with double O-ring for secure seal\u003c\/li\u003e\n\u003cli\u003eClear anodized finish resists corrosion and wear\u003c\/li\u003e\n\u003cli\u003eDesigned to withstand engine heat and vibration\u003c\/li\u003e\n\u003cli\u003eIdeal for preventative maintenance or failed part replacement\u003c\/li\u003e\n\u003cli\u003eNo special tools or modifications required for install\u003c\/li\u003e\n\u003cli\u003eMade in the USA with high-quality materials\u003c\/li\u003e\n\u003cli\u003eHelps prevent coolant leaks and improves reliability\u003c\/li\u003e\n\u003cli\u003eClean appearance and long-lasting performance under the hood\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527168401692,"sku":"WCF100155","price":40.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/F221293467.jpg?v=1743018946"},{"product_id":"20-24-gm-66l-duramax-l5p-oem-placement-coolant-tank-kit-wcf100268","title":"Wehrli 100268 L5P OEM Placement Coolant Tank Kit | 2020-2026 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMounts in OEM coolant tank location\u003c\/li\u003e\n\u003cli\u003eFabricated aluminum tank with custom powder coat\u003c\/li\u003e\n\u003cli\u003eIncludes black anodized billet cap\u003c\/li\u003e\n\u003cli\u003eIntegrated coolant level sight glass\u003c\/li\u003e\n\u003cli\u003eLow coolant level sensor included\u003c\/li\u003e\n\u003cli\u003eUses factory mounting points\u003c\/li\u003e\n\u003cli\u003eReplaces factory plastic coolant reservoir\u003c\/li\u003e\n\u003cli\u003eOverflow hose and hardware included\u003c\/li\u003e\n\u003cli\u003eImproves engine bay appearance\u003c\/li\u003e\n\u003cli\u003eInstalls easily with basic hand tools\u003c\/li\u003e\n\u003cli\u003eNo tuning or modifications required\u003c\/li\u003e\n\u003cli\u003eCompatible with stock L5P trucks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHigh-Quality Coolant Tank Upgrade for 6.6L Duramax\u003c\/h4\u003e\n\u003cp\u003eIf you’re tired of staring at that faded, yellowed plastic coolant tank every time you pop the hood, this upgrade is for you. The Wehrli OEM Placement Coolant Tank Kit gives your 2020–2026 L5P Duramax the finished, high-end engine bay it deserves, with durability to match. Designed to mount in the factory location using OEM hardware, this tank replaces the stock reservoir with a fabricated aluminum unit that’s built to last and finished in your choice of custom powder coat colors. You’ll get a clear view of coolant levels thanks to the integrated sight glass, and the included low coolant level sensor ensures your warning systems keep working just like stock. The billet aluminum cap is black anodized for a clean, aggressive look and threads on with precision thanks to its CNC-machined construction. Everything you need to install is included, from hardware to the overflow hose, and the process can be handled with basic hand tools.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Sierra\/Silverado 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement for factory plastic coolant tank.\u003c\/li\u003e\n\u003cli\u003eMounts in the OEM location with no modifications.\u003c\/li\u003e\n\u003cli\u003eFabricated from durable aluminum for long-term use.\u003c\/li\u003e\n\u003cli\u003eCustom powder coat finish adds a high-end look.\u003c\/li\u003e\n\u003cli\u003eIncludes a CNC-machined, black anodized billet cap.\u003c\/li\u003e\n\u003cli\u003eIntegrated sight glass makes checking coolant easy.\u003c\/li\u003e\n\u003cli\u003eComes with a low coolant level sensor for factory functionality.\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary installation hardware and overflow hose.\u003c\/li\u003e\n\u003cli\u003eInstalls using basic hand tools, no tuning required.\u003c\/li\u003e\n\u003cli\u003eEnhances engine bay aesthetics for show or daily driving.\u003c\/li\u003e\n\u003cli\u003ePerfect fit for 2020–2026 GM 2500HD\/3500HD 6.6L Duramax trucks.\u003c\/li\u003e\n\u003cli\u003eDesigned and built to perform like stock, but look much better.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Gloss Black","offer_id":49527192453404,"sku":"WCF100268-GB","price":523.8,"currency_code":"USD","in_stock":true},{"title":"Flourescent Orange","offer_id":51294167990556,"sku":"WCF100268-FO","price":533.5,"currency_code":"USD","in_stock":true},{"title":"Fine Texture Black","offer_id":51294168023324,"sku":"WCF100268-FTB","price":523.8,"currency_code":"USD","in_stock":true},{"title":"Grape 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Red","offer_id":51294168318236,"sku":"WCF100268-RED","price":548.05,"currency_code":"USD","in_stock":true},{"title":"Sparkle Bomber Orange","offer_id":51294168351004,"sku":"WCF100268-SBO","price":548.05,"currency_code":"USD","in_stock":true},{"title":"Sparkle Copper","offer_id":51294168383772,"sku":"WCF100268-SC","price":548.05,"currency_code":"USD","in_stock":true},{"title":"Semi-Gloss Black","offer_id":51294168416540,"sku":"WCF100268-SGB","price":523.8,"currency_code":"USD","in_stock":true},{"title":"Sparkle Granny Smith","offer_id":51294168482076,"sku":"WCF100268-SGS","price":548.05,"currency_code":"USD","in_stock":true},{"title":"Shocker Yellow","offer_id":51294168514844,"sku":"WCF100268-SY","price":533.5,"currency_code":"USD","in_stock":true},{"title":"Bengal Blue","offer_id":51294168580380,"sku":"WCF100268-BB","price":523.8,"currency_code":"USD","in_stock":true},{"title":"Blueberry 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Frost","offer_id":51294169301276,"sku":"WCF100268-CF","price":533.5,"currency_code":"USD","in_stock":true},{"title":"Candy Purple","offer_id":51294169399580,"sku":"WCF100268-CP","price":533.5,"currency_code":"USD","in_stock":true},{"title":"Candy Red","offer_id":51294169497884,"sku":"WCF100268-CR","price":548.05,"currency_code":"USD","in_stock":true},{"title":"Chevy Orange","offer_id":51294169628956,"sku":"WCF100268-CRO","price":523.8,"currency_code":"USD","in_stock":true},{"title":"Candy Teal","offer_id":51294169727260,"sku":"WCF100268-CT","price":548.05,"currency_code":"USD","in_stock":true},{"title":"Deore Gold","offer_id":51294169858332,"sku":"WCF100268-DG","price":548.05,"currency_code":"USD","in_stock":true},{"title":"Flat Black","offer_id":51294169956636,"sku":"WCF100268-FB","price":523.8,"currency_code":"USD","in_stock":true},{"title":"Fluorescent 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radiator\u003c\/li\u003e\n\u003cli\u003eEasy installation with basic hand tools\u003c\/li\u003e\n\u003cli\u003eNo modifications required on stock trucks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAdd More Durability to your 6.6L Duramax Build\u003c\/h4\u003e\n\u003cp\u003eIf you're looking to clean up the clutter under the hood of your L5P Duramax, the Wehrli Upper Coolant Pipe Kit is a simple upgrade that makes a big visual and functional impact. Designed specifically for 2020–2026 Silverado and Sierra HD trucks, this kit replaces the factory rubber upper radiator hose with a precision-fabricated aluminum hard pipe that not only looks great but lasts longer. Each pipe is powder coated in your choice of color, so it blends in or stands out, depending on how you want your engine bay to look. Unlike the stock rubber hose that can sag or deteriorate over time, this hard pipe gives your cooling system a clean, high-end appearance while maintaining a strong, leak-free connection. 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quick installation with basic tools\u003c\/li\u003e\n\u003cli\u003eGreat for routine coolant changes or flushes\u003c\/li\u003e\n\u003cli\u003eBacked by limited lifetime PPE warranty\u003c\/li\u003e\n\u003cli\u003eIdeal for clean, mess-free coolant service\u003c\/li\u003e\n\u003cli\u003eUniversal fit for a wide range of vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eMake Coolant Maintenance Easy And Mess Free\u003c\/h4\u003e\n\u003cp\u003eIf you’ve ever struggled to drain your coolant without making a mess or fighting with factory clamps, the PPE Coolant Hose Drain is the fix you didn’t know you needed. This smart little upgrade installs directly into any 2-inch OEM coolant hose and gives you a reliable, reusable drain point right where you want it. No more cutting into lines, rigging up makeshift drains, or letting coolant pour all over your driveway. Just crack the 1\/4-inch NPT plug, and you’re draining clean and controlled. It’s built from corrosion-resistant 304 stainless steel, so it holds up to heat, pressure, and time without breaking a sweat. And with the included stainless clamps and smooth beaded ends, you can count on a leak-free seal every time. Whether you're doing regular service or a full system flush, this kit turns a hassle into a breeze and keeps your hands, and your shop, clean.\u003c\/p\u003e\n\u003ch4\u003eDesigned To Add Function Without Compromising Integrity\u003c\/h4\u003e\n\u003cp\u003eThe PPE 2-inch OEM Coolant Hose Drain with 1\/4-inch NPT Bung is engineered to offer precision, simplicity, and durability where it counts. Built from 304 stainless steel, it’s highly resistant to rust and corrosion even in long-term coolant exposure and harsh under hood environments. The fitting features smooth beaded ends that improve hose grip and reduce the risk of leaks over time, especially under pressure. Its 1\/4-inch NPT bung provides a dependable access point for draining coolant without needing to cut hoses or disassemble hard-to-reach factory connections. Installation requires no welding or fabrication and can be done with basic tools right in your garage. The included stainless steel clamps ensure a secure fit that stays put through heat cycles and vibration. Whether you're installing it as part of a new cooling system build or retrofitting it to simplify future service, this drain adds serious value without overcomplicating the job. 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Fortunately, Wehrli Custom Fab has the solution with their Billet Heater Core Fitting with Hose! This high-quality, pre-formed heater hose assembly replaces the OEM fitting with a much more durable unit that comes ready to perform right out of the box. This kit comes standard with billet aluminum quick-connect fittings along with serviceable O-Rings which allow for easy maintenance procedures without compromise. The included hose is even built stronger over stock, giving you more peace of mind when your applications become extreme. 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This kit relocates the factory fuel and coolant pumps from their tight spot at the front of the engine to a much more accessible area. That extra space gives you room to run larger turbos, custom intercooler piping, or even just make maintenance less of a headache. This kit includes CNC-machined billet aluminum brackets and OE-style fittings to ensure everything bolts up clean and seals tight. It also comes complete with high-quality hoses and hardware, so you don’t have to chase down extra parts. 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The PPE Fan Clutch Delete Nut gives you the clean, reliable solution your build deserves without dealing with bulky OEM parts you’re not using. Whether you're running an external electric fan for better airflow or doing a full custom engine bay, this delete nut helps simplify and clean up the front of your engine. With billet 15-5 stainless steel construction, you’re getting long-term corrosion resistance and strength you can trust. It threads on precisely and looks just as good as it functions, making it a smart addition for both form and function. PPE designed this part with real-world applications in mind, so whether you're working on a street truck or a track beast, this delete nut handles it. And with fitment spanning 2001 to 2025 GM 6.6L Duramax engines, you know it’s got wide support. This is one of those small upgrades that make a big impact.\u003c\/p\u003e\n\u003ch4\u003ePrecision Fit Built For Custom Applications\u003c\/h4\u003e\n\u003cp\u003eThe PPE Fan Clutch Delete Nut is engineered for builders who need exact performance without compromise. Designed with an M36-2.0 thread size, it perfectly replaces the factory fan clutch when it's no longer needed in your cooling configuration. Constructed from billet 15-5 stainless steel, it offers exceptional tensile strength and resistance to corrosion, making it a reliable component in demanding environments. Its CNC machined profile ensures a snug, vibration-resistant fit, eliminating the worry of loosening over time. Whether you're outfitting a marine application or switching to a high-performance electric fan system, this part is built to meet the needs of serious custom work. Compatible with all GM 6.6L Duramax engines from 2001 to 2025, it’s versatile enough for a range of diesel projects. PPE includes a one year limited warranty for added confidence, and the installation is as straightforward as it gets. For builders who expect precision, durability, and simplicity, this delete nut checks every box.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \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 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 custom cooling applications\u003c\/li\u003e\n\u003cli\u003eEliminates the factory fan clutch assembly entirely\u003c\/li\u003e\n\u003cli\u003eIdeal for vehicles using electric or external fans\u003c\/li\u003e\n\u003cli\u003eConstructed from billet 15-5 stainless steel\u003c\/li\u003e\n\u003cli\u003eEngineered for high durability and corrosion resistance\u003c\/li\u003e\n\u003cli\u003eFeatures an M36-2.0 thread size for proper fitment\u003c\/li\u003e\n\u003cli\u003eCNC machined for a precise and secure install\u003c\/li\u003e\n\u003cli\u003eNot compatible with factory fan setups\u003c\/li\u003e\n\u003cli\u003eBest suited for off-road, marine, or racing applications\u003c\/li\u003e\n\u003cli\u003eFits all 6.6L Duramax engines from 2001–2025\u003c\/li\u003e\n\u003cli\u003eIncludes a 1-year limited manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527578493212,"sku":"PPE119100100","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/ppe_20119100100_01.jpg?v=1722359554"},{"product_id":"ppe-119030100-304-stainless-steel-coolant-tube-pump-to-oil-cooler-01-24-gm-66l-duramax","title":"PPE 119030100 Raw 304 Stainless Steel Coolant Tube (Pump to oil cooler) | 2001-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRaw Finish\u003c\/li\u003e\n\u003cli\u003eSpecifically designed for use with the factory oil cooler filter housing.\u003c\/li\u003e\n\u003cli\u003eMade from 304 stainless steel.\u003c\/li\u003e\n\u003cli\u003eHeavy-duty flange.\u003c\/li\u003e\n\u003cli\u003eSuperior to OEM mild steel pipe, which is prone to rusting and leaking.\u003c\/li\u003e\n\u003cli\u003eEnsures a precise fit and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eRobust \u0026amp; Reliable\u003c\/h4\u003e\n\u003cp\u003eUpgrade your engine's reliability with this premium coolant pipe, specifically designed for use with the factory oil cooler filter housing. Custom fabricated with a heavy-duty flange, this coolant pipe ensures a secure and durable connection. Constructed from 304 stainless steel, it offers superior resistance to corrosion, preventing the rusting and leaking issues commonly associated with OEM mild steel pipes. Enhance your vehicle's performance and longevity with this robust and reliable coolant pipe, engineered for optimal functionality and long-lasting performance.\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, 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 2001–2025 Silverado\/Sierra 2500HD \u0026amp; 3500HD with 6.6L Duramax.\u003c\/li\u003e\n\u003cli\u003eDesigned to work with the factory oil cooler filter housing.\u003c\/li\u003e\n\u003cli\u003eMade from 304 stainless steel to resist rust and corrosion.\u003c\/li\u003e\n\u003cli\u003eHeavy-duty flange provides a secure, leak-free seal.\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM mild steel pipe prone to failure.\u003c\/li\u003e\n\u003cli\u003eRaw finish offers a simple, durable look.\u003c\/li\u003e\n\u003cli\u003eImproves long-term reliability of the cooling system.\u003c\/li\u003e\n\u003cli\u003eEngineered for a precise fit, no modifications required.\u003c\/li\u003e\n\u003cli\u003eIdeal for stock or performance-built Duramax trucks.\u003c\/li\u003e\n\u003cli\u003eHelps protect engine by reducing risk of coolant leaks.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527590977820,"sku":"PPE119030100","price":197.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/ppe119030100_6.jpg?v=1743084820"},{"product_id":"ppe-119030130-304-stainless-steel-coolant-tube-pump-to-oil-cooler-01-24-gm-66l-duramax","title":"PPE 119030130 Polished 304 Stainless Steel Coolant Tube (pump to oil cooler) | 2001-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePolished Finish\u003c\/li\u003e\n\u003cli\u003eSpecifically designed for use with the factory oil cooler filter housing.\u003c\/li\u003e\n\u003cli\u003eMade from 304 stainless steel.\u003c\/li\u003e\n\u003cli\u003eHeavy-duty flange.\u003c\/li\u003e\n\u003cli\u003eSuperior to OEM mild steel pipe, which is prone to rusting and leaking.\u003c\/li\u003e\n\u003cli\u003eEnsures a precise fit and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eRobust \u0026amp; Reliable\u003c\/h4\u003e\n\u003cp\u003eEnhance your engine's reliability with our premium coolant pipe, expertly designed to integrate seamlessly with the factory oil cooler filter housing. Featuring a custom-fabricated, heavy-duty flange, this coolant pipe guarantees a secure and robust connection, ensuring your vehicle operates at its best. Crafted from 304 stainless steel, this coolant pipe offers exceptional resistance to corrosion, effectively preventing the rust and leaks that often plague OEM mild steel pipes. Upgrade your vehicle's performance and longevity with this durable and reliable coolant pipe, engineered for optimal functionality and enduring performance.\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, 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 2001–2025 Silverado\/Sierra 2500HD \u0026amp; 3500HD with 6.6L Duramax.\u003c\/li\u003e\n\u003cli\u003eDesigned to work with the factory oil cooler filter housing.\u003c\/li\u003e\n\u003cli\u003eMade from 304 stainless steel for superior corrosion resistance.\u003c\/li\u003e\n\u003cli\u003eHeavy-duty flange ensures a strong, leak-free connection.\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM mild steel pipe prone to rust and failure.\u003c\/li\u003e\n\u003cli\u003eProvides long-term reliability and reduced maintenance concerns.\u003c\/li\u003e\n\u003cli\u003ePolished finish adds durability and a clean engine bay look.\u003c\/li\u003e\n\u003cli\u003eRecommended for stock or performance-built Duramax trucks.\u003c\/li\u003e\n\u003cli\u003eUpgrades cooling system integrity and overall engine protection.\u003c\/li\u003e\n\u003cli\u003eBuilt for a precise fit, no modifications required.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527591371036,"sku":"PPE119030130","price":197.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/ppe119030130_2.jpg?v=1743084746"},{"product_id":"ppe-119020040-inlet-heater-core-supply-hose-kit-2020-2025-gm-sierra-silverado-2500hd-3500hd-6-6l-duramax-l5p","title":"PPE 119020040 Inlet Heater Core Supply Hose Kit | 2020-2025 GM Sierra\/Silverado 2500HD\/3500HD 6.6L Duramax L5P","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2020-2025 Silverado and Sierra HD\u003c\/li\u003e\n\u003cli\u003eDesigned for 6.6L Duramax L5P\u003c\/li\u003e\n\u003cli\u003eDurable 5mm thick silicone construction\u003c\/li\u003e\n\u003cli\u003eReinforced 4-ply hose design\u003c\/li\u003e\n\u003cli\u003eHigh heat resistant material\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation\u003c\/li\u003e\n\u003cli\u003eNo cutting or modifications required\u003c\/li\u003e\n\u003cli\u003eIncludes stainless steel hose clamps\u003c\/li\u003e\n\u003cli\u003eResists heat moisture and chemicals\u003c\/li\u003e\n\u003cli\u003eReplaces OEM hose GM 85056544\u003c\/li\u003e\n\u003cli\u003eImproves long term cooling system reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUpgrade Your Cooling System With Confidence Under The Hood\u003c\/h4\u003e\n\u003cp\u003eIf you have ever dealt with a worn or brittle coolant hose, you already know how quickly it can turn into a bigger problem, and this PPE inlet heater core supply hose kit is built to prevent that headache. Designed for 2020-2025 Silverado and Sierra 2500HD and 3500HD trucks with the 6.6L Duramax L5P, this kit replaces a common wear item with something far more durable. The upgraded silicone construction holds up better under heat and pressure, which is exactly what your truck sees day in and day out. Additionally, this is a direct bolt-on setup, so you are not cutting or modifying anything just to get it installed. It is the kind of upgrade you can knock out in the garage and immediately feel better about when you fire the truck up. Whether you are towing, commuting, or putting your truck to work, having reliable coolant flow is critical. This kit helps you stay ahead of failures and keeps your cooling system working the way it should.\u003c\/p\u003e\n\u003ch4\u003eEngineered Silicone Construction For Long Term Duramax Reliability\u003c\/h4\u003e\n\u003cp\u003eThe PPE 119020040 inlet heater core supply hose kit is built using 5mm thick 4-ply silicone, which offers improved durability over standard rubber hoses. This multi-layer construction is designed to handle elevated temperatures and pressure cycles common in diesel engine bays. Additionally, silicone material resists breakdown from heat, moisture, and chemical exposure, helping extend service life over time. The kit is designed as a direct replacement for OEM part number 85056544, ensuring proper fitment on 2020-2025 GM HD trucks equipped with the L5P Duramax. It includes stainless steel worm-drive clamps that provide a secure hold and resist corrosion in harsh environments. Proper hose integrity is essential for maintaining consistent coolant flow to the heater core, especially in demanding conditions. With this upgrade, you are reinforcing a key part of the cooling system with materials built to last.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025 GM Sierra\/Silverado 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 2020-2025 GM 2500HD and 3500HD\u003c\/li\u003e\n\u003cli\u003eDesigned for 6.6L Duramax L5P only\u003c\/li\u003e\n\u003cli\u003eDirect replacement for GM 85056544\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation design\u003c\/li\u003e\n\u003cli\u003eNo cutting or modifications required\u003c\/li\u003e\n\u003cli\u003eIncludes stainless steel hose clamps\u003c\/li\u003e\n\u003cli\u003eConstructed from 4-ply silicone material\u003c\/li\u003e\n\u003cli\u003eBuilt for high heat engine environments\u003c\/li\u003e\n\u003cli\u003eVerify vehicle fitment before purchase\u003c\/li\u003e\n\u003cli\u003eRecommended for cooling system service upgrades\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":53993245802780,"sku":"PPE119020040","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/Heater-HoseInlet-GM-6.6L-Duramax-2020-2025-L5P-119020040_1.webp?v=1774037886"},{"product_id":"ppe-119020044-outlet-heater-core-supply-hose-kit-2020-2025-gm-sierra-silverado-2500hd-3500hd-6-6l-duramax-l5p","title":"PPE 119020044 Outlet Heater Core Supply Hose Kit | 2020-2025 GM Sierra\/Silverado 2500HD\/3500HD 6.6L Duramax L5P","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2020-2025 Silverado and Sierra HD\u003c\/li\u003e\n\u003cli\u003eDesigned for 6.6L Duramax L5P\u003c\/li\u003e\n\u003cli\u003eDurable 5mm thick silicone construction\u003c\/li\u003e\n\u003cli\u003eReinforced 4-ply hose design\u003c\/li\u003e\n\u003cli\u003eHigh heat resistant material\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation\u003c\/li\u003e\n\u003cli\u003eNo cutting or modifications required\u003c\/li\u003e\n\u003cli\u003eIncludes stainless steel hose clamps\u003c\/li\u003e\n\u003cli\u003eResists heat moisture and chemicals\u003c\/li\u003e\n\u003cli\u003eReplaces OEM hose GM 85119145\u003c\/li\u003e\n\u003cli\u003eSupports long term cooling reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUpgrade Your Cooling System With A Hose Built To Handle Real Work\u003c\/h4\u003e\n\u003cp\u003eWhen you are looking under the hood of your Duramax, it is easy to overlook a hose until it becomes a problem, and that is exactly why this PPE outlet heater core supply hose kit is worth the upgrade. Built for 2020-2025 Silverado and Sierra 2500HD and 3500HD trucks, it replaces a common wear item with something far more durable and reliable. The factory rubber hoses can break down over time from constant heat and pressure, especially if your truck is used for towing or heavy work. Additionally, this silicone upgrade gives you peace of mind knowing your cooling system is better equipped to handle those conditions. Installation is straightforward with a direct bolt-on design, so you are not dealing with extra steps or modifications. It is the kind of upgrade you can install in your garage and immediately feel confident about. If you want to stay ahead of potential failures, this is a smart move that supports long term reliability.\u003c\/p\u003e\n\u003ch4\u003eDesigned For Consistent Coolant Flow And Heat Resistance In L5P Engines\u003c\/h4\u003e\n\u003cp\u003eThe PPE 119020044 outlet heater core supply hose kit is engineered specifically for 6.6L Duramax L5P applications in 2020-2025 GM HD trucks. It features a 5mm thick 4-ply silicone construction that is built to withstand high temperatures and pressure cycles found in diesel engine bays. Additionally, silicone material resists degradation from heat, moisture, and chemical exposure, helping extend service life compared to standard rubber hoses. This hose is designed as a direct replacement for OEM part number 85119145, ensuring proper fitment and routing within the cooling system. The included stainless steel worm-drive clamps provide a secure and corrosion resistant connection at each mounting point. Maintaining proper coolant flow through the heater core circuit is important for both engine temperature management and cabin heating performance. With this upgrade, you are reinforcing a key part of your cooling system with materials built to last under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025 GM Sierra\/Silverado 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 2020-2025 GM 2500HD and 3500HD\u003c\/li\u003e\n\u003cli\u003eDesigned for 6.6L Duramax L5P only\u003c\/li\u003e\n\u003cli\u003eDirect replacement for GM 85119145\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation design\u003c\/li\u003e\n\u003cli\u003eNo cutting or modifications required\u003c\/li\u003e\n\u003cli\u003eIncludes stainless steel hose clamps\u003c\/li\u003e\n\u003cli\u003eConstructed from 4-ply silicone material\u003c\/li\u003e\n\u003cli\u003eBuilt for high heat engine environments\u003c\/li\u003e\n\u003cli\u003eVerify vehicle fitment before purchase\u003c\/li\u003e\n\u003cli\u003eRecommended for cooling system service upgrades\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":53993288171804,"sku":"PPE119020044","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/Heater-Hose-Outlet-GM-6.6L-Duramax-2020-2025-L5P-119020044_1_1.webp?v=1774039248"},{"product_id":"fleece-fpe-dmax-cbop-billet-coolant-block-off-plate-2001-2025-gm-silverado-sierra-2500hd-3500hd-6-6l-duramax","title":"Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBillet aluminum construction for durability\u003c\/li\u003e\n\u003cli\u003eIntegrated O-ring, no gasket required\u003c\/li\u003e\n\u003cli\u003eEliminates common coolant leaks\u003c\/li\u003e\n\u003cli\u003eThicker than factory plate design\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM part numbers\u003c\/li\u003e\n\u003cli\u003ePrecision machined for exact fit\u003c\/li\u003e\n\u003cli\u003eCorrosion resistant billet finish\u003c\/li\u003e\n\u003cli\u003eDesigned for 6.6L Duramax engines\u003c\/li\u003e\n\u003cli\u003eFits 2001-2025 Silverado\/Sierra HD models\u003c\/li\u003e\n\u003cli\u003eSimple bolt-on installation\u003c\/li\u003e\n\u003cli\u003eImproves long-term engine reliability\u003c\/li\u003e\n\u003cli\u003eBacked by one-year limited warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePut An End To Duramax Coolant Leaks For Good\u003c\/h4\u003e\n\u003cp\u003eIf you have ever dealt with a slow coolant leak at the rear of your Duramax, you already know how frustrating it can be to track down and fix. This billet coolant block off plate from Fleece Performance is built to solve that problem with confidence and keep it from coming back. The factory plate is known to weaken over time, which leads to seepage and repeat repairs that no one wants to deal with. This upgraded design is thicker and far more durable, giving you peace of mind every time you fire up your truck. Additionally, the integrated O-ring eliminates the need for a traditional gasket, which is often the weak point in sealing surfaces. Installation is straightforward, making it an easy upgrade when you are already working in that area of the engine. Once installed, you can count on a tighter seal and a cleaner engine bay without the constant worry of leaks. It is a simple upgrade that makes a noticeable difference in long term reliability.\u003c\/p\u003e\n\u003ch4\u003ePrecision Machined Upgrade Designed For Long Term Sealing Performance\u003c\/h4\u003e\n\u003cp\u003eBuilt from high quality billet aluminum, this coolant block off plate is engineered to outperform the stock stamped component in both strength and sealing capability. The increased thickness adds rigidity, which helps maintain consistent clamping force across the sealing surface under heat and pressure. Furthermore, the integrated square cut O-ring is designed to provide a more reliable seal compared to traditional flat gaskets that can degrade over time. This design reduces the chances of coolant seepage, especially in high mileage or heavily used engines. It is a direct replacement for OEM part numbers 97941204 and 12698239, ensuring proper fitment on 2001-2025 GM Silverado and Sierra 2500HD and 3500HD models equipped with the 6.6L Duramax. The precision machining process ensures a tight, accurate fit that aligns perfectly with factory mounting points. Corrosion resistance is another key benefit, helping the plate hold up in harsh engine bay conditions. Backed by a one year limited warranty, this component delivers both performance and confidence where it matters most.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \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 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\u003eReplaces known leak-prone factory rear cover plate\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for Duramax rear engine location\u003c\/li\u003e\n\u003cli\u003eUses integrated O-ring instead of traditional gasket\u003c\/li\u003e\n\u003cli\u003eEnsure proper surface cleaning before installation\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM part numbers listed\u003c\/li\u003e\n\u003cli\u003eCompatible with multiple Duramax model years\u003c\/li\u003e\n\u003cli\u003eIdeal during rear engine or transmission service\u003c\/li\u003e\n\u003cli\u003eBillet design differs from factory stamped steel\u003c\/li\u003e\n\u003cli\u003eCheck O-ring condition before final install\u003c\/li\u003e\n\u003cli\u003eCovered by one year limited parts warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fleece Performance Products","offers":[{"title":"Default Title","offer_id":54039381901596,"sku":"FLCFPE-DMAX-CBOP","price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/plate1.jpg?v=1776182584"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/collections\/GM_Duramax_Radiator_Thumb_1.jpg?v=1728492020","url":"https:\/\/www.alligatorperformance.com\/collections\/2020-2022-gm-duramax-66l-l5p-cooling-upgrades.oembed?page=2","provider":"Alligator Performance","version":"1.0","type":"link"}