{"product_id":"merchant-automotive-engine-gasket-set-with-head-gaskets-450000c-2001-2004-6-6l-duramax-lb7","title":"MERCHANT AUTOMOTIVE ENGINE GASKET SET (WITH HEAD GASKETS) 450000C | 2001-2004 6.6L DURAMAX LB7","description":"\u003cp\u003eComplete a head gasket replacement or engine rebuild on your GM 6.6L Duramax LB7 with the Merchant Automotive 450000C Engine Gasket Set. This comprehensive kit combines Grade C head gaskets with many of the seals, O-rings, gaskets, and installation supplies commonly required when disassembling and reassembling an LB7 engine.\u003c\/p\u003e\n\n\u003cp\u003eIn addition to the Grade C cylinder head gaskets, the kit includes injector cup O-rings, injector seal kits, injector return line components, lower valve cover gaskets, exhaust manifold and up-pipe gaskets, cooling system seals, intake seals, and a turbo inlet gasket. High-temperature RTV sealant and red threadlocker are also supplied for applicable areas of the repair.\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 LB7 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 sealing and return-line components\u003c\/li\u003e\n  \u003cli\u003eIncludes lower valve cover gaskets\u003c\/li\u003e\n  \u003cli\u003eIncludes exhaust manifold and up-pipe gaskets\u003c\/li\u003e\n  \u003cli\u003eIncludes intake, turbo inlet, and cooling system seals\u003c\/li\u003e\n  \u003cli\u003eIncludes high-temperature RTV sealant\u003c\/li\u003e\n  \u003cli\u003eIncludes red threadlocker\u003c\/li\u003e\n  \u003cli\u003eConvenient alternative to sourcing individual engine gaskets and seals separately\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 Cup O-Ring Kit – 16-Pack of GM 94051259\u003c\/li\u003e\n  \u003cli\u003e(1) FICM Fuel Line Banjo Seal Kit – 2 Seals\u003c\/li\u003e\n  \u003cli\u003e(1) Small LB7 Injector Return Line Seal Kit – 3-Pack\u003c\/li\u003e\n  \u003cli\u003e(2) LB7 Injector Seal Kits\u003c\/li\u003e\n  \u003cli\u003e(2) Red Threadlocker\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) Exhaust Manifold-to-Up-Pipe Gaskets\u003c\/li\u003e\n  \u003cli\u003e(2) Lower Valve Cover Gaskets\u003c\/li\u003e\n  \u003cli\u003e(1) High-Temperature Aluminum RTV Sealant – 2.8 oz.\u003c\/li\u003e\n  \u003cli\u003e(2) LB7 Injector Return Line Kits – Each Includes (1) 98065992 and (4) 97228933\u003c\/li\u003e\n  \u003cli\u003e(1) Upper Radiator Pipe Seal\u003c\/li\u003e\n  \u003cli\u003e(2) Thermostat Housing Crossover-to-Cylinder Head Gaskets\u003c\/li\u003e\n  \u003cli\u003e(2) Intake Pipe Seals\u003c\/li\u003e\n  \u003cli\u003e(1) Turbo Inlet Gasket\u003c\/li\u003e\n  \u003cli\u003e(1) Oil Fill Tube Seal\u003c\/li\u003e\n  \u003cli\u003e(2) Exhaust Manifold Gaskets\u003c\/li\u003e\n  \u003cli\u003e(1) Heater Pipe Seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e2001–2004 GM applications equipped with the 6.6L Duramax LB7 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":53950745215259,"sku":"450000C","price":343.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2026-09-15at12.52.59PM.png?v=1789677256","url":"https:\/\/wwmperformance.com\/products\/merchant-automotive-engine-gasket-set-with-head-gaskets-450000c-2001-2004-6-6l-duramax-lb7","provider":"WWM Performance","version":"1.0","type":"link"}