{"product_id":"inline-pro-k20c1-k20c4-m12-xtreme-duty-head-stud-set-upgrade-from-m11","title":"Inline PRO K20C1 K20C4 M12 Xtreme Duty Head Stud Set (upgrade from M11)","description":"\u003cp\u003e\u003cspan style=\"font-size: small;\"\u003eOur Honda K20C1 K20C4 M-series M12 Extreme Duty head studs are made from the Highest Grade Premium American Alloy that have gone through rigorous heat treatment and testing. With a minimum tensile strength of 230kpsi, these are not prone to hydrogen embrittlement like the L19\/H11 material and can be handled without worrying about failures. We use a True-beam design all the way through the length of the stud resulting in better clamping force and torque values (it's not necked-down or undercut like others). \"Only settle for the Best!\"\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan style=\"font-size: small;\"\u003eThe kit includes: Studs, nuts, washers, lube, and instructions.\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan style=\"font-size: small;\"\u003e- Engine block must be re-threaded to accept the larger M12 stud using our custom M11 to M12 transition tap kit (sold separately).\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan style=\"font-size: small;\"\u003e- No modification is necessary to the cylinder head (use with stock OEM dowel pins).\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e \u003c\/p\u003e \u003cdiv\u003e \u003c\/div\u003e","brand":"Inline Performance","offers":[{"title":"No","offer_id":48834517368986,"sku":"IP-HS-M12K20C1","price":349.95,"currency_code":"USD","in_stock":true},{"title":"Yes","offer_id":48834517401754,"sku":null,"price":479.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/5799\/2602\/files\/S2000_HEADSTUDS__79891.1752809330.1280.1280.jpg?v=1785075501","url":"https:\/\/inlinepro.com\/products\/inline-pro-k20c1-k20c4-m12-xtreme-duty-head-stud-set-upgrade-from-m11","provider":"inlinePRO","version":"1.0","type":"link"}