Edelbrock Performer RPM NHRA Legal Big Block Chevy Rectangular Port Cylinder Head Bare

The Edelbrock #60547 Performer RPM Bare NHRA Stock/Super Stock Rectangle Port cylinder heads are designed for Big-Block Chevy applications. These cylinder heads deliver great throttle response and power from 1500 to 6500 rpm. Cast and heat treated at the Edelbrock Foundry and machined at Edelbrock's manufacturing facility in the USA, Edelbrock heads are the best in quality and performance. All Edelbrock Cylinder Heads are designed from scratch using the latest in computer technology by our own highly skilled engineer's. Using highly efficient ports and state-of-the-art combustion chamber shapes, Edelbrock cylinder heads offer improved performance throughout the rpm range for great throttle response and top-end horsepower. Top-quality features include threaded inserts in rocker stud and exhaust bolt holes for superior strength and durability, and manganese-bronze valve guides with ductile iron valve seats. These are features that some other companies don't include!

Installation 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 are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat.
    All Performer and Performer RPM Big-Block Chevy heads: Spark plug is closer to center of bore, will interfere with high-dome pistons for open chamber heads.
    Use pistons designed for our heads. Match with Edelbrock head gasket sets.
    Designed for street/high-performance big-blocks operating from 2500-7000 rpm
    Specially designed ports for increased flow and velocity over standard big-block cylinder 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

CNC Ported    No
Combustion Chamber Volume    118.0 cc
Deck Height    10.2 in
Deck Thickness    0.562 in
Guide Plates Included    No
Intake Runner Volume    315.0 cc
Material    Aluminum
Push Rod Diameter    0.375 in
Valve Angle    26 deg