The Edelbrock Victor Junior Cylinder Head is designed specifically for maximum horsepower and ideal for many types of competition and ultra-high performance street machines. This head features reinforced rocker stud bosses, high-flow intake/exhaust ports and specially contoured combustion chambers. The extra thick deck surfaces provide maximum head gasket retention with high-compression ratios. It is ideal for those who desire affordable heads that make maximum power. This cylinder head features CNC gasket-matched port entries/exits with blended valve bowls. Standard hardware is accepted and most are available in bare and assembled versions. The intake runner volume is 210cc; the exhaust runner volume is 75cc and the combustion chamber volume is 60cc. The diameter of the intake valve is 2. 05 and the diameter of the exhaust valve is 1. 6. The outside diameter of the outer spring is 1. 55 and the maximum valve lift is 0. 65.