{"product_id":"genx-255-cylinder-heads","title":"GenX 255 Cylinder Heads","description":"The Trick Flow Specialties GenX 255 cylinder heads are performance-oriented components engineered for GM LS3 engines. These heads are not a stock replacement and are specifically designed for LSX-based engines utilizing a 6-bolt configuration with a minimum bore diameter of 4.000 inches.\n\nConstructed with advanced features, these cylinder heads boast a 255cc intake runner volume and a 69cc CNC-machined combustion chamber. They come assembled with 450 lbs.\/in. dual valve springs, titanium retainers, and have a 2.165-inch intake valve diameter. The 6-bolt pattern ensures a secure and robust mounting.\n\nThese heads include new rocker arm rail mounts for compatibility with OEM LS3 1.7 ratio rocker arms.","brand":"Trick Flow Specialties","offers":[{"title":"Default Title","offer_id":52664037146936,"sku":"TFS-3261T004-C01","price":118.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687723720.jpg?v=1784332310","url":"https:\/\/store.motormia.co\/products\/genx-255-cylinder-heads","provider":"MOTORMIA","version":"1.0","type":"link"}