Edelbrock 8503 - Edelbrock Buick Performer RPM Cylinder Head

Sold individually, these heads are ready to install out of the box, have high-flow 130cc exhaust ports, and boast a 9.2:1 compression ratio with stock pistons.

Applications
Buick 400/430/455

Specifications
Combustion Chamber: 68cc
Intake Runner Volume: 215cc
Exhaust Runner Volume: 130cc
Intake Valve: 2.125"
Exhaust Valve: 1.750"
Deck thickness: 5/8" (1.550" O.D.)
Valve Spring: up to .600" lift
Rocker Stud: 3/8"
Guideplate: hardened steel
Spark plug: 14mm x 3/4"

Tech Notes
These heads require hardened pushrods and are designed to be used with adjustable rockers (standard small block Chevy rocker arms are widely accessible and recommended).