BBC PERFORMER RPM 454-R CYL. HEAD BARE.
EDELBROCK 60549

BBC PERFORMER RPM 454-R CYL. HEAD BARE.

Performer RPM 454 Rectangle Port 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 Performer heads include drilled heat cross-over Cylinder Head Specifications

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 Deck thickness 9/16" Valve spring diameter 1.55" Valve spring maximum lift .700" Rocker stud 7/16" Guideplate Hardened steel Pushrod diameter 3/8" Valve angle 26 Exhaust port location Stock Spark plug fitment 14mm x 3/4 reach, gasket seat Made In USA

Technical Notes: Bare heads will have valve guides & seats installed, but will require final sizing & a valve job to match the valves you will be using. Recommended spark plugs 14mm x 3/4" reach with flat gasket seat (Champion RC12YC).