The Edelbrock #60499 Performer for Big-Block Chevy Oval Port V8 applications is perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed and provides outstanding performance from Idle-5,500 RPM's. The 100cc semi-open chamber cylinder heads feature a 1-1/2 Deg rolled over (angle milled) design that improves intake port alignment and provides a smaller combustion chamber without shrouding the valves. They also feature the highest quality intake and exhaust valves and valve springs. This cylinder head is 50-state street legal

Material Aluminum CNC Ported No Combustion Chamber Volume 100 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