GM Performance Parts SB-Chevy Bowtie Vortec Cylinder Heads

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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.