GM Performance 25534421 - GM Performance Parts SB-Chevy Bowtie Vortec Cylinder Heads

Bowtie Vortec Cylinder Heads 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. Bowtie Vortec Cylinder Heads offer you Fast Burn performance in an affordable cast iron head that is often used for short-track racing applications.