The Edelbrock #60459 Performer RPM O-Port cylinder head for Big-Block Chevy is perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed. This cylinder head delivers great throttle response and power from 1500 to 6500 rpm and is capable of 500-600 horsepower. They also feature the highest quality intake and exhaust valves and valve springs.

Material        Aluminum CNC Ported        No Combustion Chamber Volume        110 cc Intake Runner Volume        290 cc Deck Thickness        0.5625 in Intake Valve Diameter        2.19 in Exhaust Valve Diameter        1.88 in Valve Seat Angle Int/Exh        45/45 degree Guide Plates Included        Yes Guide Plate Material        Hardened Steel Push Rod Diameter        (Suggested) 0.4375 in Rocker Stud Diameter        0.4375 in Valve Angle        26 deg Valve Spring Diameter        1.50 in Valve Spring Maximum Lift        0.700 in Valve Stem Diameter        0.3438 in