{"product_id":"1680-245cc-ls1-mongoose-strip-cylinder-head","title":"1680 245cc LS1 Mongoose Strip Cylinder Head","description":"The AFR 1680 is a 245cc Mongoose strip cylinder head specifically engineered for the LSX platform, designed for maximum effort and high-RPM performance. Recommended for dedicated race vehicles or aggressive \"Pro Street\" builds, this head supports displacements up to 454 cubic inches and operates optimally below 6800 RPM.\n\nConstructed from A356 aluminum, the 1680 features fully CNC-ported intake, exhaust, and combustion chambers, a competition 5-angle valve job, and comes equipped with 8mm bead lock stainless steel valves (2.165\" intake, 1.600\" exhaust). It includes PAC Racing dual valve springs with a .650\" maximum lift, 7° titanium retainers, 7° bead lock keepers, Viton valve seals, and hardened valve spring locators. The head is assembled with ductile iron intake and exhaust valve seats, and 8mm bronze valve guides.\n\nInstallation requires careful consideration, including a minimum bore diameter of 4.000\" to accommodate the 2.165\" intake valve. The product is CARB legal for 2005 and older emissions-controlled vehicles under CARB EO #D-250-4 when using the 65cc combustion chambers. It has provisions for 1997-1998 perimeter bolt valve covers and may require conversion kits for certain applications.","brand":"AFR","offers":[{"title":"Default Title","offer_id":52686843904312,"sku":"AFR1680","price":3069.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660673264.webp?v=1784877413","url":"https:\/\/store.motormia.co\/products\/1680-245cc-ls1-mongoose-strip-cylinder-head","provider":"MOTORMIA","version":"1.0","type":"link"}