{"product_id":"m712-boost-monster-283cc-ls7-cylinder-heads-660-springs","title":"M712 Boost Monster 283cc LS7 Cylinder Heads .660 Springs","description":"\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\n\u003cp\u003e\u003cem\u003eIN STOCK READY TO SHIP\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFully CNC ported, 68cc chamber volume\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eUpgraded CHE Bronze Guides Installed\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e283cc Intake Port, 95cc Exhaust Port and 12° Valve Angle\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e68cc Chamber Optimized for BOOSTED Applications.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e.660 Dual Spring Kit\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2.205 \/ 1.614\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Quality Components:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eStainless Steel Severe Duty or CRN Titanium Intake Valves\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eInconel Exhaust Valves\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCustom Valve Springs (Options Available – Call us!)\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitanium Retainers\u003c\/strong\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2″ Headers Recommended\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCustom P1 Understud Kit Available and Recommended\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSold Per Set\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"stock available-on-backorder\"\u003eAvailable on backorder\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Frankenstein Engine Dynamics","offers":[{"title":"Default Title","offer_id":47354510672125,"sku":"113065-RBR","price":4200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/7489\/5101\/files\/M712-1.png?v=1747836475","url":"https:\/\/frankensteined.net\/products\/m712-boost-monster-283cc-ls7-cylinder-heads-660-springs","provider":"Frankenstein Engine Dynamics","version":"1.0","type":"link"}