{"product_id":"gator-stud-kit-oem-grade-c-head-gaskets-for-2001-2016-gm-6-6l-duramax-diesel","title":"Gator Head Stud Kit Grade C Head Gaskets For 2001-2016 GM 6.6L Duramax Diesel","description":"\u003cp\u003eThis 3-piece performance bundle includes the Gator Fasteners HSK66 Heavy Duty Head Stud Kit and a pair of OEM GM Grade C Cylinder Head Gaskets (12637785 \u0026amp; 12637788)—a complete solution for top-end durability and performance on your 2001–2016 GM 6.6L Duramax engine. Whether you’re towing, racing, or tuned for high boost, this combo is built to handle extreme stress and prevent head gasket failure.\u003c\/p\u003e\n\u003cp\u003eGator’s HD220 alloy studs provide a 220,000 PSI tensile strength, ensuring maximum clamping force and resistance to head lift. The GM Grade C gaskets match OE fit and finish with 1.05mm thickness for optimal sealing under high combustion pressure. Perfect for LB7, LLY, LBZ, LMM, and LML engines, this setup provides the sealing reliability you need on or off the road.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHD220 head studs rated at 220,000 PSI tensile strength\u003c\/li\u003e\n\u003cli\u003eIncludes OEM GM Grade C head gaskets (Left \u0026amp; Right)\u003c\/li\u003e\n\u003cli\u003eBlack oxide coated studs resist rust and corrosion\u003c\/li\u003e\n\u003cli\u003eRolled threads post-heat treatment for fatigue resistance\u003c\/li\u003e\n\u003cli\u003eGator Juice lube ensures proper torque application\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on replacement for stock head bolts and gaskets\u003c\/li\u003e\n\u003cli\u003eGaskets are OE-grade, 1.05mm Grade C thickness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStud Material: HD220 high-strength alloy steel\u003c\/li\u003e\n\u003cli\u003eGasket Grade: GM Grade C – 1.05mm compressed thickness\u003c\/li\u003e\n\u003cli\u003eGasket Part Numbers: 12637785 (L), 12637788 (R)\u003c\/li\u003e\n\u003cli\u003eFinish: Black oxide corrosion-resistant coating\u003c\/li\u003e\n\u003cli\u003eTensile Strength: 220,000 PSI\u003c\/li\u003e\n\u003cli\u003eThread Type: Rolled after heat treatment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(36) Heavy Duty Head Studs\u003c\/li\u003e\n\u003cli\u003e(36) Hardened Parallel-Ground Washers\u003c\/li\u003e\n\u003cli\u003e(36) 12-Point High-Strength Nuts\u003c\/li\u003e\n\u003cli\u003e(8) Head Bolts\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e(1) Bottle of Gator Juice Assembly Lube\u003c\/li\u003e\n\u003cli\u003e(1) OEM GM Head Gasket – Left Side (12637785)\u003c\/li\u003e\n\u003cli\u003e(1) OEM GM Head Gasket – Right Side (12637788)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2001–2016 Chevy\/GMC Silverado\/Sierra 2500\/3500 6.6L Duramax (LB7\/LLY\/LBZ\/LMM\/LML)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e5 Year Limited Warranty\u003c\/li\u003e\n\u003cli\u003eFollow included torque specs and sequence for install\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Gator Fasteners","offers":[{"title":"Default Title","offer_id":46965811740829,"sku":"HSK66 | 12637785 | 12637788","price":744.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0645\/2504\/1821\/files\/Screenshot2025-06-26161643.png?v=1750969058","url":"https:\/\/rudysdiesel.com\/products\/gator-stud-kit-oem-grade-c-head-gaskets-for-2001-2016-gm-6-6l-duramax-diesel","provider":"Rudy's Performance Parts","version":"1.0","type":"link"}