Edelbrock 60459 Performer RPM Cylinder Head

The Edelbrock Performer RPM 454-O Street Cylinder Heads are oval port heads that will support over 540 HP with 9. 5: 1 compression when used as part of the Total Power Package. These street high-performance heads provide out-of-the-box, bolt-on performance with no additional porting required. They offer improved power throughout the RPM range for great throttle response and top-end horsepower . The intake and exhaust runners are CNC-profiled for superior flow and performance. This unique intake port design produces flow, close to rectangular port heads, but with the smaller port size and velocity of an oval port for excellent seat-of-the-pants performance and crisp throttle response. The semi-open chamber design maximizes combustion efficiency with streetable compression ratios. The stainless steel 2. 19" intake and 1. 88" exhaust valves have smaller-than-stock 11/32" valve stems to promote excellent flow and lighter valve weight. The deck surface and water jackets were specially designed to work with all big-block engine blocks. The heads include top-quality ARP rocker studs, bronze guides and hardened, ductile iron valve seats.

• 110cc combustion chamber with 290cc intake runner
• 2. 19" intake and 1. 88" exhaust valves
• Oval port heads will support over 540 HP with 9. 5: 1 compression when used as part of the Total Power Package
• Semi-open chamber design maximizes efficiency with streetable compression ratios
• Smaller-than-stock 11/32" valve stems promote excellent flow and lighter valve weight
• Fit type: Vehicle Specific