{"product_id":"wcf100188-l5p-duramax-thermostat-housing-red","title":"Wehrli L5P Duramax Thermostat Housing - WCFab Red","description":"\u003ch4\u003eEngine Bay Upgrade That Actually Holds Up to Boost\u003c\/h4\u003e\n\u003cp\u003eStop staring at a cracked, faded factory thermostat housing every time you pop the hood. The WCF100188 from Wehrli Custom Fabrication swaps in a CNC machined billet aluminum housing finished in durable WCFab Red powder coat, built specifically for the 2017-2025 6.6L L5P Duramax. It is a direct bolt-in replacement that cleans up the engine bay while giving you a stronger, more reliable coolant connection point than the OEM plastic unit.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement for the factory L5P thermostat housing\u003c\/li\u003e\n\u003cli\u003eCNC machined from billet aluminum for long-term durability\u003c\/li\u003e\n\u003cli\u003eCustom WCFab Red powder coat finish resists fading and chipping\u003c\/li\u003e\n\u003cli\u003eCompletes the look when paired with a WCFab Upper Coolant Pipe or Intake Kit\u003c\/li\u003e\n\u003cli\u003eBolts on with no cutting or permanent modification required\u003c\/li\u003e\n\u003cli\u003ePart number WCF100188 engineered and manufactured in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017-2025\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 2500HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017-2025\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 3500HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017-2025\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 2500HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017-2025\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 3500HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eFits any 2017-2025 truck equipped with the 6.6L L5P Duramax diesel engine. Always confirm your engine code before ordering the WCF100188.\u003c\/p\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003eWCF100188\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eWehrli Custom Fabrication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eBillet Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eWCFab Red Powder Coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3.0 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e8 in x 8 in x 8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Application\u003c\/td\u003e\n\u003ctd\u003e6.6L L5P Duramax\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1x Wehrli WCF100188 Billet Thermostat Housing in WCFab Red\u003c\/li\u003e\n\u003cli\u003eMounting hardware\u003c\/li\u003e\n\u003cli\u003eRequired gaskets and seals for installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eAbout Wehrli Custom Fabrication\u003c\/h4\u003e\n\u003cp\u003eWehrli Custom Fabrication, known as WCFab, has spent years building precision diesel performance parts for Duramax, Power Stroke, and Cummins platforms. Every WCFab housing is CNC machined in house and powder coated to a standard that holds up to years of engine bay heat cycling, making it a favorite among diesel truck owners who want factory-fit parts with a serious upgrade in both looks and durability.\u003c\/p\u003e\n\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cstrong\u003eWhat is the WCF100188?\u003c\/strong\u003e\n\u003cp\u003eThe WCF100188 is a billet aluminum thermostat housing from Wehrli Custom Fabrication built as a direct replacement for the factory thermostat housing on the 2017-2025 6.6L L5P Duramax. It comes finished in WCFab Red powder coat.\u003c\/p\u003e\n\u003cstrong\u003eWill this fit my truck if I already installed an aftermarket intake or coolant pipe?\u003c\/strong\u003e\n\u003cp\u003eYes, this housing is designed to pair with other WCFab cooling and intake components, so it will not conflict with an existing WCFab Upper Coolant Pipe or Intake Kit.\u003c\/p\u003e\n\u003cstrong\u003eDo I need to replace the thermostat itself when installing this housing?\u003c\/strong\u003e\n\u003cp\u003eYou can reuse your existing thermostat as long as it is in good working condition, though many customers choose to install a fresh thermostat at the same time since the housing is already off the engine.\u003c\/p\u003e\n\u003cstrong\u003eDoes installing this require special tools?\u003c\/strong\u003e\n\u003cp\u003eNo special tools are needed. Basic hand tools and a standard socket set are sufficient for a home garage install.\u003c\/p\u003e\n\u003cstrong\u003eWill I need to drain my coolant to install this?\u003c\/strong\u003e\n\u003cp\u003eYes, you will need to drain the coolant system before removing the factory housing, then refill and bleed the system after installation.\u003c\/p\u003e\n\u003cstrong\u003eIs this housing compatible with other powder coat colors if I already have red accents?\u003c\/strong\u003e\n\u003cp\u003eWCFab offers this housing in multiple finish options including WCFab Grey, Candy Teal, Gloss White, and Gloss Black, so you can match your existing engine bay theme.\u003c\/p\u003e\n\u003cstrong\u003eDoes this come with a warranty?\u003c\/strong\u003e\n\u003cp\u003eWehrli Custom Fabrication backs this housing against manufacturing defects. Contact us with your order details if you run into any fitment or quality issues.\u003c\/p\u003e\n\u003cstrong\u003eCan I return this if it does not fit my truck?\u003c\/strong\u003e\n\u003cp\u003eYes, unused parts in original condition can be returned within our standard return window. Reach out to our support team to start the process.\u003c\/p\u003e\n\u003cstrong\u003eDo I need an alignment or tuning update after installing this housing?\u003c\/strong\u003e\n\u003cp\u003eNo, this is a cooling system component only and does not affect alignment or require a tune change.\u003c\/p\u003e\n\n\u003ch4\u003eInstall Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eAllow the engine to fully cool before starting any coolant system work\u003c\/li\u003e\n\u003cli\u003eDrain the coolant system into an approved container\u003c\/li\u003e\n\u003cli\u003eRemove the factory upper coolant pipe or hose connections from the OEM thermostat housing\u003c\/li\u003e\n\u003cli\u003eUnbolt and remove the OEM thermostat housing\u003c\/li\u003e\n\u003cli\u003eTransfer the thermostat to the new WCF100188 housing or install a new thermostat\u003c\/li\u003e\n\u003cli\u003eInstall new gaskets and bolt the WCF100188 housing into place\u003c\/li\u003e\n\u003cli\u003eReconnect coolant lines and hoses\u003c\/li\u003e\n\u003cli\u003eRefill the coolant system and bleed air from the lines\u003c\/li\u003e\n\u003cli\u003eStart the engine and check for leaks before closing the hood\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Wehrli","offers":[{"title":"Default Title","offer_id":46141824270415,"sku":"WCFWCF100188-RED","price":185.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/wcf100188-thermostat-housing-l5p-duramax.webp?v=1784728805","url":"https:\/\/www.blackopsautoworks.com\/products\/wcf100188-l5p-duramax-thermostat-housing-red","provider":"Black Ops Auto Works","version":"1.0","type":"link"}