The Performer RPM Rectangular Port Aluminum Cylinder Heads by Edelbrock have specially designed intake and exhaust ports for increased flow and velocity compared to standard big-block heads.
They feature a highly-efficient 118cc open-style combustion chamber for maximum performance.
Engineered with high-velocity 315cc long and 300cc short intake runners, they are designed for street and high-performance vehicles, operating from 2,500-7,000 RPM.
The stainless steel, hardened tip 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 specially designed deck surface and water jackets work with all big-block engines.
The intake runner volume is 315cc and the exhaust runner volume is 300cc.
The heads include top-quality ARP rocker studs, bronze guides, and hardened, ductile iron valve seats.
