{"product_id":"6-0l-lq4-lq9-cast-iron-bare-engine-block","title":"6.0L LQ4 LQ9 Cast Iron Bare Engine Block","description":"The Chevrolet Performance 6.0L LQ4 LQ9 Cast Iron Bare Block (SKU 12733807) is engineered for enthusiasts building high-performance LS engines. This robust cast iron block is derived from the popular LQ4 and LQ9 truck and SUV applications but is specifically manufactured without Active Fuel Management (AFM) provisions, making it ideal for supercharged and turbocharged street applications.\n\nConstructed with a standard LS oiling system and featuring stock cast 6-bolt main bearing caps, this block offers a strong foundation for significant power levels. It has a bore of 4.002 inches, with a maximum recommended bore of 4.030 inches, and a deck height of 9.240 inches. The rear seal type is the 1-piece LS design.\n\nThis bare block is intended for custom engine builds, offering flexibility for stroker configurations such as the LS 370 or 408 engines when paired with a suitable rotating assembly. Professional preparation and blueprinting services are available to ensure the block is ready for assembly.","brand":"GM","offers":[{"title":"Default Title","offer_id":52688565109048,"sku":"12733807","price":2499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/663689879.jpg?v=1784891105","url":"https:\/\/store.motormia.co\/products\/6-0l-lq4-lq9-cast-iron-bare-engine-block","provider":"MOTORMIA","version":"1.0","type":"link"}