The Edelbrock Performer RPM bare cylinder head for 1962-1979 Pontiac 389-455 engines features 72cc combustion chambers for higher-compression builds and is patterned after the Ram Air IV design. This bare head includes valve guides and seats and offers thicker deck surfaces than other brands, making it well suited for professional porting and machining.
Edelbrock Single Perf Pontiac 72cc Head Bare