{"product_id":"merchant-automotive-450400c-engine-gasket-setwith-head-gaskets-4504000c-2011-2016-6-6l-duramax-lml","title":"MERCHANT AUTOMOTIVE 450400C ENGINE GASKET SET(WITH HEAD GASKETS) 4504000C | 2011-2016 6.6L DURAMAX LML","description":"\u003cp\u003eComplete a head gasket replacement or engine rebuild on your GM 6.6L Duramax LML with the Merchant Automotive 450400C Engine Gasket Set. This comprehensive kit combines Grade C cylinder head gaskets with many of the seals, O-rings, and gaskets commonly required when disassembling and reassembling an LML engine.\u003c\/p\u003e\n\n\u003cp\u003eThe kit includes injector sealing components, upper and lower valve cover gaskets, exhaust manifold and up-pipe gaskets, intake Y-bridge seals, turbocharger oil feed and return gaskets, cooling system seals, PCV system seals, and numerous EGR system gaskets. High-temperature RTV sealant is also included for applicable sealing surfaces. Merchant Automotive combines OE-style and upgraded components to provide a complete solution for major LML engine service.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComprehensive gasket and seal kit for LML engine service\u003c\/li\u003e\n  \u003cli\u003eIncludes Grade C cylinder head gaskets\u003c\/li\u003e\n  \u003cli\u003eSuitable for head gasket replacement or complete engine rebuilding\u003c\/li\u003e\n  \u003cli\u003eIncludes injector copper washers, body seals, and return-line seals\u003c\/li\u003e\n  \u003cli\u003eIncludes upper and lower valve cover gaskets\u003c\/li\u003e\n  \u003cli\u003eIncludes exhaust manifold, up-pipe, and turbocharger connection gaskets\u003c\/li\u003e\n  \u003cli\u003eIncludes intake Y-bridge gaskets and seals\u003c\/li\u003e\n  \u003cli\u003eIncludes multiple EGR system gaskets and seals\u003c\/li\u003e\n  \u003cli\u003eIncludes PCV system seals\u003c\/li\u003e\n  \u003cli\u003eIncludes turbocharger oil feed and return gaskets\u003c\/li\u003e\n  \u003cli\u003eIncludes cooling system seals\u003c\/li\u003e\n  \u003cli\u003eIncludes high-temperature RTV sealant\u003c\/li\u003e\n  \u003cli\u003eOE-style and upgraded replacement components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eGrade C Cylinder Head Gaskets\u003c\/li\u003e\n  \u003cli\u003e(1) Injector Copper Washer Kit – 8-Pack\u003c\/li\u003e\n  \u003cli\u003e(1) LML Injector Body Seal Kit – 8-Pack\u003c\/li\u003e\n  \u003cli\u003e(1) LML Injector Fuel Return Line Seal Kit – 8-Pack\u003c\/li\u003e\n  \u003cli\u003e(1) EGR Coolant Pipe Drain Seal\u003c\/li\u003e\n  \u003cli\u003e(2) Upper Valve Cover Gaskets\u003c\/li\u003e\n  \u003cli\u003e(1) PCV Valve Seal\u003c\/li\u003e\n  \u003cli\u003e(1) Upper Bypass Pipe Seal at Thermostat Housing\u003c\/li\u003e\n  \u003cli\u003e(1) Bypass Pipe Seal\u003c\/li\u003e\n  \u003cli\u003e(2) Oil Level Indicator Tube Seals\u003c\/li\u003e\n  \u003cli\u003e(2) Exhaust Manifold-to-Up-Pipe Gaskets\u003c\/li\u003e\n  \u003cli\u003e(2) Turbo-to-Up-Pipe Gaskets\u003c\/li\u003e\n  \u003cli\u003e(2) Intake Y-Bridge Gaskets\u003c\/li\u003e\n  \u003cli\u003e(1) High-Temperature Aluminum RTV Sealant – 2.8 oz.\u003c\/li\u003e\n  \u003cli\u003e(1) Fuel Feed Pipe Gasket\u003c\/li\u003e\n  \u003cli\u003e(2) Thermostat Housing Crossover-to-Cylinder Head Gaskets\u003c\/li\u003e\n  \u003cli\u003e(1) Turbo Oil Feed Pipe Gasket at Engine\u003c\/li\u003e\n  \u003cli\u003e(1) Upper Intake Y-Bridge Seal\u003c\/li\u003e\n  \u003cli\u003e(1) Turbo Mouthpiece Inlet Seal\u003c\/li\u003e\n  \u003cli\u003e(2) EGR-to-Y-Bridge Gaskets\u003c\/li\u003e\n  \u003cli\u003e(1) Oil Fill Tube Seal\u003c\/li\u003e\n  \u003cli\u003e(2) EGR Valve Gaskets\u003c\/li\u003e\n  \u003cli\u003e(1) Up-Pipe-to-EGR Cooler Bypass Gasket\u003c\/li\u003e\n  \u003cli\u003e(1) EGR Valve Cooler Gasket\u003c\/li\u003e\n  \u003cli\u003e(1) EGR Valve Gasket Between EGR Cooler Assembly\u003c\/li\u003e\n  \u003cli\u003e(1) EGR Recirculation Pipe Gasket\u003c\/li\u003e\n  \u003cli\u003e(2) Exhaust Manifold Gaskets\u003c\/li\u003e\n  \u003cli\u003e(2) PCV Drain Ventilation Hose Fitting Seals – Hose Side and Block Side\u003c\/li\u003e\n  \u003cli\u003e(1) Turbo Oil Return Pipe Gasket at Engine\u003c\/li\u003e\n  \u003cli\u003e(1) PCV Oil Separator Seal\u003c\/li\u003e\n  \u003cli\u003e(2) PCV Valve \/ Turbo Resonator Seals\u003c\/li\u003e\n  \u003cli\u003e(2) Lower Valve Cover Gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e2011–2016 GM applications equipped with the 6.6L Duramax LML diesel engine\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis kit includes Grade C cylinder head gaskets. Cylinder head bolts or aftermarket head studs are not listed as included and should be purchased separately if required for your repair.\u003c\/p\u003e","brand":"Merchant Automotive","offers":[{"title":"Default Title","offer_id":53951004475675,"sku":"450400C","price":499.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2026-09-15at1.31.14PM.png?v=1789680806","url":"https:\/\/wwmperformance.com\/products\/merchant-automotive-450400c-engine-gasket-setwith-head-gaskets-4504000c-2011-2016-6-6l-duramax-lml","provider":"WWM Performance","version":"1.0","type":"link"}