{"product_id":"ls3-assembled-cylinder-head","title":"LS3 Assembled Cylinder Head","description":"The Chevrolet Performance LS3 Cylinder Head Assembly is engineered for enhanced performance in LS-based engines. This assembled head features a 68.4cc combustion chamber volume and a 260cc intake runner volume, contributing to improved volumetric efficiency. Constructed from durable 319-T5 aluminum alloy, it is designed to withstand demanding operating conditions.\n\nKey specifications include 2.165-inch solid stem intake valves and 1.590-inch solid stem exhaust valves, supporting a maximum valve lift of 0.550 inches. The head also features a 15-degree valve angle and a casting number of 823.\n\nThis cylinder head is compatible with LS family engines featuring a 4.000-inch bore or larger. It is important to note that Chevrolet Performance LS3 heads will not fit 4.8L and 5.3L engines due to their smaller bore size. The head can replace GM part numbers 12598594, 12615879, and 12629063.","brand":"Chevrolet","offers":[{"title":"Default Title","offer_id":52687345156408,"sku":"12629063","price":1475.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660191532.jpg?v=1784883022","url":"https:\/\/store.motormia.co\/products\/ls3-assembled-cylinder-head","provider":"MOTORMIA","version":"1.0","type":"link"}