{"product_id":"racing-head-service-rhs-54903u","title":"Racing Head Service (RHS) 54903U - LS Aluminum Race Block Standard Deck 4.125 Bore","description":"\u003cp\u003eRacing Head Service (RHS) 54903U - LS Aluminum Race Block Standard Deck 4.125 Bore\u003c\/p\u003e\u003cp\u003eEngine - Bare Block - 4.125 in Bore - 9.250 Deck - Standard Main - 6-Bolt Mains - 1-Piece Seal - 6-Bolt Head - Aluminum - Natural - GM LS-Series - Each\u003c\/p\u003e\u003cp\u003eThis block has a 9.240 deck height with a 4.125 bore and a 5.87 cylinder sleeve length. Cylinder walls are Siamese cast with press-in cast iron sleeves. 12AN feeds for dry sumps. Aircraft-quality A357-T6 aluminum. 6-Head Bolt Design.\u003c\/p\u003e\u003cp\u003eIn recent years, LS engine technology has revolutionized the GM performance aftermarket. Gen IV engines have set a new standard for factory horsepower and torque. To meet the growing demand of today?s high performance engine builders and racing enthusiasts, engineers at RHSesigned an aluminum LS engine block for radical street and all-out racing applications.\u003c\/p\u003e\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCylinder Bore Diameter\u003c\/strong\u003e: \u003cspan\u003e4.125\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCylinder Quantity\u003c\/strong\u003e: \u003cspan\u003e8\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDeck Height\u003c\/strong\u003e: \u003cspan\u003e9.24\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMain Bearing Cap Bolt Quantity\u003c\/strong\u003e: \u003cspan\u003e6\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: \u003cspan\u003eAluminum\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eGrade Type\u003c\/strong\u003e: \u003cspan\u003ePerformance\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Racing Head Service (RHS)","offers":[{"title":"Default Title","offer_id":47348811432074,"sku":"DXKK-54903U","price":6823.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/0619\/2778\/files\/0_54903u_normalized.jpg?v=1776793872","url":"https:\/\/www.onlyinstock.com\/products\/racing-head-service-rhs-54903u","provider":"Only In Stock","version":"1.0","type":"link"}