{"product_id":"mast-cylinder-heads-black-label-ls3-255cc-69cc-chamber-bare-single-510-203","title":"Mast Cylinder Heads - Black Label LS3 - 255CC - 69CC Chamber - Bare - Single","description":"\u003cp\u003eMAST CYLINDER HEADS - BLACK LABEL LS3 - 255cc - 69cc CHAMBER - BARE - SINGLE - 510-203\u003cbr\u003e\n• Designed for any new Gen IV 6.0L or 6.2L engine\u003cbr\u003e\n • Including LS3, L99, L92, L76, LY6, LSA and LS9\u003cbr\u003e\n • Available as packages for LS3 Camaro, Corvette, L99 Camaro \u0026amp; L76 Pontiac G8\u003cbr\u003e\n • The 6-Bolt design is compatible with GM LSX, LS Next and RHS blocks\u003cbr\u003e\n • Accepts Gen IV LS3 valvetrain and intake manifolds.\u003cbr\u003e\n • Uses a 2.165\" intake valve and 1.600\" exhaust valve\u003cbr\u003e\n • Has a 256cc intake port\u003cbr\u003e\n • Has a 69cc combustion chamber standard\u003cbr\u003e\n • Has a deck thickness of .750\"\u003c\/p\u003e","brand":"Mast Motorsports","offers":[{"title":"Default Title","offer_id":52041654894886,"sku":"510-203","price":1343.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/1666\/1542\/files\/m2_510-203_89.jpg?v=1770810394","url":"https:\/\/billysspeedshop.com\/fr\/products\/mast-cylinder-heads-black-label-ls3-255cc-69cc-chamber-bare-single-510-203","provider":"Billys Speed Shop","version":"1.0","type":"link"}