{"product_id":"12-valve-020-over-fire-ring-head-gasket-07-g-12v-f20","title":"12-Valve .020-Over Fire-Ring Head Gasket 07-g-12v-f20","description":"\u003cp\u003e'89–'98 Fire Ring Gasket – .080″ Thick, 4.560″ Wire O.D.\u003c\/p\u003e\n\u003cp\u003eUpgrade your 12V Cummins (1989–1998) with our Fire Ring Gasket, engineered for reliable sealing under high boost and extreme horsepower. At .080″ thickness (1.8 mm) and 4.560″ wire O.D., this gasket is built to handle the stress of performance applications.\u003c\/p\u003e\n\u003cp\u003eGasket \u0026amp; Groove Specifications\u003cbr\u003eThickness: .080″ (1.8 mm)\u003cbr\u003eWire O.D.: 4.560″ (using .105″ wire)\u003cbr\u003eGroove depth: .016″–.017″ in cylinder head with a .120″ radius cutter\u003c\/p\u003e\n\u003cp\u003eRecommended Installation Steps\u003c\/p\u003e\n\u003cp\u003eSurface Preparation\u003cbr\u003e- Machine block \u0026amp; head for maximum flatness — especially important above 800 HP.\u003cbr\u003e- Engines under 800 HP: cut groove in just the cylinder head. Over 800 HP: use a high-tensile ARP 625 fastener.\u003cbr\u003e- Radiused cutter always recommended for best gasket-to-wire contact.\u003c\/p\u003e\n\u003cp\u003eStuds Are Essential\u003cbr\u003e- Use quality studs for proper clamp load.\u003cbr\u003e- Generous lubrication on nuts, washers, threads for even torque.\u003cbr\u003e- Never exceed manufacturer torque limits.\u003c\/p\u003e\n\u003cp\u003eTorque Procedure\u003cbr\u003e- Initial torque: 130 ft-lbs before first startup.\u003cbr\u003e- Hot retorque after reaching operating temperature, while still warm.\u003cbr\u003e- Recheck valve lash after each retorque — the gasket compresses further.\u003c\/p\u003e\n\u003cp\u003eBuilt for high-horsepower applications beyond 800 HP, with precision .080″ thickness, radiused grooves, and .105″ wire for optimal sealing.\u003c\/p\u003e","brand":"Hamilton Cams","offers":[{"title":"Default Title","offer_id":50091741380885,"sku":"07-g-12v-f20","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0845\/6844\/1109\/files\/07-g-12v-f20-1.jpg?v=1786715166","url":"https:\/\/shop.davesusa.com\/products\/12-valve-020-over-fire-ring-head-gasket-07-g-12v-f20","provider":"Dave's Auto Center","version":"1.0","type":"link"}