{"product_id":"gm-6-6l-duramax-lml-top-end-gasket-kit-with-head-studs","title":"Extreme Diesel Performance Top End Gasket Kit w\/Head Studs XDK215 | 2011-2016 Duramax 6.6L LML","description":"\u003cp\u003e\u003cstrong\u003eGM 6.6L Duramax LML Top End Gasket Kit with Head Studs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis \u003cstrong\u003eTop End Gasket Kit\u003c\/strong\u003e is the complete solution for servicing or reinstalling the cylinder heads on your GM 6.6L Duramax LML. Perfect for head gasket failures, cylinder head replacement, or top-end engine service, this kit provides the critical components needed to get your engine back on the road.\u003c\/p\u003e\n\u003cp\u003eAt the core of the kit is the \u003cstrong\u003eMAHLE HS54580C Head Set\u003c\/strong\u003e, which offers OE-style gaskets and seals for long-lasting performance. It also includes \u003cstrong\u003eGM 12637785\u003c\/strong\u003e and \u003cstrong\u003eGM 12637788 Grade C (1.05mm) Head Gaskets\u003c\/strong\u003e for both the left and right banks of your Duramax engine. Instead of factory TTY head bolts, this kit upgrades to \u003cstrong\u003eGator Fasteners Head Studs\u003c\/strong\u003e, which provide superior clamping force and are reusable.\u003c\/p\u003e\n\u003cp\u003eTo ensure proper installation, the kit also includes \u003cstrong\u003eThread Cleaning Chasers\u003c\/strong\u003e to prepare engine block threads, giving consistent torque readings. For lubrication, \u003cstrong\u003eXtra Slick Engine \u0026amp; Fastener Assembly Lube\u003c\/strong\u003e protects against wear, rust, and corrosion while ensuring smooth installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComprehensive kit for top-end engine service\u003c\/li\u003e\n\u003cli\u003eIncludes MAHLE HS54580C OE-style head set\u003c\/li\u003e\n\u003cli\u003eGM 12637785 \u0026amp; 12637788 Grade C OEM replacement head gaskets\u003c\/li\u003e\n\u003cli\u003eGator Fasteners Head Stud Kit for superior clamping force\u003c\/li\u003e\n\u003cli\u003eThread Cleaning Chasers for clean, accurate torque readings\u003c\/li\u003e\n\u003cli\u003eXtra Slick Engine \u0026amp; Fastener Assembly Lubricant included\u003c\/li\u003e\n\u003cli\u003eReusable studs vs. single-use TTY factory bolts\u003c\/li\u003e\n\u003cli\u003eHelps prevent head gasket failures under heavy load\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Xtreme Diesel Performance","offers":[{"title":"Default Title","offer_id":51085872234779,"sku":"XDK215","price":1135.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2025-09-30at10.33.27AM.png?v=1759250014","url":"https:\/\/wwmperformance.com\/products\/gm-6-6l-duramax-lml-top-end-gasket-kit-with-head-studs","provider":"WWM Performance","version":"1.0","type":"link"}