Performer RPM CNC Cylinder Heads For Pontiac


Performer RPM CNC Cylinder Heads for Pontiac by Edelbrock
 
  • Cylinder 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: Hardended steel
  • Pushrod diameter: 5/16"
  • Valve angle: 14°
  • Exhaust port location: Stock Ram Air IV
  • Spark plug fitment: 14mm x 3/4 reach, gasket seat
 

Performer RPM CNC cylinder heads have the same specifications as our popular Performer RPM cylinder heads for 1962-79 389-455 c.i.d. Pontiac engines, but feature a CNC machined combustion chamber. The CNC machined chamber results in a consistent and precise chamber for improved flow performance. Performer RPM CNC cylinder heads are available in two chamber sizes. The 87cc chamber version is ideal for 9.5:1 engines and will deliver excellent street performance on low octane fuel. Performer RPM CNC cylinder heads with 72cc chambers are best for higher compression engines. Both are patterned after the same port flange configuration as the 1969-1970 Ram-Air IV Pontiac cylinder head.
  Complete (Single)
Application Dyno Emissions Satin
EQUIPPED WITH SPRINGS FOR USE IN HYDRAULIC ROLLER CAMSHAFT APPLICATIONS
Performer RPM CNC (87cc) - 61525
Performer RPM CNC (72cc) - 61515
 
EQUIPPED WITH SPRINGS FOR USE IN HYDRAULIC FLAT TAPPET CAMSHAFT APPLICATIONS
Performer RPM CNC (87cc) - 61529
Performer RPM CNC (72cc) - 61519
Edelbrock Installation Note INSTALLATION NOTE: These heads require Ram Air IV (round port) style exhaust manifolds or headers and Edelbrock head bolt kit #8549. Match with Edelbrock complete head gasket set #7382. Deck thickness: 5/8", rocker stud diameter: 7/16", pushrod diameter: 5/16" (width of slot in guide plate).
Edelbrock Tech Note TECH NOTE: Please view Cylinder Head Flow Data and Valve Springs & Retainers for all Edelbrock Performance Aluminum Cylinder Heads.
Edelbrock Tech Note PRODUCT EMISSIONS GUIDE
The following guide is designed to help you determine which Edelbrock components are legal for use on your vehicle. Learn more about Edelbrock Product Emissions Guide.

    50-State Legal
    For Racing Use ONLY
    For Use on Pre-Pollution Controlled Vehicles (PPCV)
    Stock Replacement Part
    Engine Swaps