Edelbrock Performer RPM Pontiac Cylinder Head - Chamber Size: 72cc SC021 All required hardware is included

All required hardware is included for a hassle-free installation

For best results check oil catch cans every 500 to 1K miles and dispose of contents when needed

idle speed

the new LoadLifter 7500 XL kit from Air Lift Company will make towing and hauling with your GM 2500HD/3500 pickup a comfortable and stress-free experience

Edelbrock Performer RPM Pontiac Cylinder Head - Chamber Size: 72cc SC021 All required hardware is includedCylinder Head Specifications:; Combustion chamber volume: 87cc; Intake runner volume: 215cc; Exhaust runner volume: 175cc; Intake valve diameter: 2. 11"; Exhaust valve diameter: 1. 66"; Valve stem diameter: 11 32"; Valve guides: Manganese bronze; Deck thickness: 5 8"; Valve spring diameter: 1. 46"; Valve spring maximum lift: . 575"; Rocker stud: 7 16"; Guideplate: Hardened steel; Pushrod diameter: 5 16"; Valve angle: 14 ; Exhaust port location: Stock