These are GM Performance Parts' most powerful cast iron cylinder heads designed for street or racing applications in the 400-450 horsepower range. As an upgraded production head, they come with bigger valves, a thicker deck surface, and a 66cc combustion chamber, which offer tremendous low-lift flow numbers. They offer you Fast Burn performance in an affordable cast iron head that is often used for short-track racing applications.Features:
Completely assembled, ready to bolt-on225cc intake port77cc exhaust port65cc combustion chamberImproved airflowFlows 281 cfm @.600"Uses Fel-Pro #1470 exhaust gasket, may require minor trimming.2.00'' Int/1.55'' Exh ValvesSold individually