RPM Big-Block Chevy Oval Port Cylinder Head Hydraulic Roller Cam

The Edelbrock #60455 Performer RPM O-Port cylinder heads are designed for Big-Block Chevy applications. The Edelbrock #60455 Performer RPM heads are perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed. These cylinder heads deliver great throttle response and power from 1500 to 6500 rpm. They also feature the highest quality intake and exhaust valves and valve springs. For use on pre-pollution controlled vehicles only.

INSTALLATION NOTE:
• EQUIPPED WITH SPRINGS FOR USE IN HYDRAULIC ROLLER CAMSHAFT APPLICATIONS
• Match with Edelbrock head gasket sets.
• Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat.
• These oval port heads will support over 540 hp with 9.5:1 compression when used as part of the Total Power Package®
• Unique oval intake port shape produces flow similar to rectangular ports, but the smaller port size provides excellent seat-of-the-pants performance and crisp throttle response
• Semi-open chamber design maximizes efficiency with streetable compression ratios
• Smaller-than-stock 11/32" valve stems promote excellent flow and lighter valve weight