BB Chevy, 118cc chambers, great torque and horsepower up to 6500 rpm

ED60559

60559

Performer RPM heads are perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed. These heads give great torque and horsepower up to 6500 rpm. Designed for street/high-performance big-blocks operating from 2500-7000 rpm. Specially designed ports for increased flow and velocity over standard big-block heads. Highly-efficient 118cc open-style combustion chamber. High-velocity 315cc long/300cc short intake ports. Smaller-than-stock 11/32" valve stems promote excellent flow and lighter valve weight. Combustion chamber volume: 118cc Intake runner volume: 315cc Exhaust runner volume: 110cc Intake valve diameter: 2.19" Exhaust valve diameter: 1.88" Valve stem diameter: 11/32" Valve guides: Manganese bronze In: USA Deck thickness: 9/16" Valve spring diameter: 1.55" Valve spring maximum lift: .700" Rocker stud: 7/16" Guide plate: Hardened Steel Pushrod diameter: 3/8" Valve Angle: 26° Exhaust port location: Stock Spark plug fitment: 14mm x 3/4" reach, gasket seat Made