The Edelbrock #60575 Performer cylinder head is designed for outstanding performance gains in 1962-79 389-455 c.i.d. Pontiac engines. The Edelbrock #60575 Performer cylinder head is 50-state emissions legal for 1965-79 vehicles. They feature 87cc combusti Product Features:Complete Single For Hydraulic Roller87cc Combustion Chamber Volume215cc Intake/175cc Exhaust Runner Volume2.11 in. Intake/1.66 in. Exhaust Valve Diameter0.625 in. Deck Thickness
