Edelbrock BB Chevy Performer RPM 454-R Cylinder Head w/ Valves AR100020 1988-1990 GMC K2500

1988-1990 GMC K2500

1-1/2" and larger spacers are uniquely designed allowing spacer to remain bolted to water pump while changing fans

mild stall

Clear Anodize

Ideal for applications where the Accusump can not be mounted near the driver

Edelbrock BB Chevy Performer RPM 454-R Cylinder Head w/ Valves AR100020 1988-1990 GMC K2500Cylinder Head Specifications: Combustion chamber volume: 110cc 118cc; Intake runner volume: 290cc; Exhaust runner volume: 110cc; Intake valve diameter: 2. 25"; Exhaust valve diameter: 1. 89"; Valve stem; diameter: 11 32"; Valve guides: Manganese bronze; Deck thickness: 9 16"; Valve spring diameter: Hydraulic Roller (#61555); Valve spring maximum lift: N A; Rocker stud: 7 16"; Guideplate: Hardened steel; Pushrod diameter: 3 8"; Valve angle: 26 ;