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Performer RPM Cylinder Head #61025 BB Oldsmobile, Hydraulic Roller Camshaft

$1,223.50
The Edelbrock #61025 Performer RPM Cylinder Head for 1965-76 Oldsmobile 400, 425 and 455 CID V8 engines is a perfect performance upgrade for big-block Olds-powered street machines and muscle cars.
In stock
SKU
61025
The Edelbrock #61025 Performer RPM Cylinder Head for 1965-76 Oldsmobile 400, 425 and 455 CID V8 engines with hydraulic roller cam is a perfect performance upgrade for big-block Olds-powered street machines and muscle cars. This aluminum cylinder head supersedes the 60515 Olds head and features a redesigned 77cc combustion chamber, larger intake valves and refined bowl blending for improved flow. The #61025 Performer RPM head has improved accommodation for a factory-style mechanical fuel pump with spark plug locations moved slightly towards the exhaust valve for optimized combustion. Intake and exhaust ports have been improved over previous designs, and extra material has been added above the intake port for head work. Performer RPM #61025 heads are cast and machined by Edelbrock in the USA and comes complete with the highest quality intake and exhaust valves and valve springs.
More Information
Manufacturer Edelbrock
Application Application Specific
UPC 00085347610259
Series Performer RPM
Quantity Sold Individually
Availability Note Available to Order
Warranty 12 Months
Horsepower 450-600 HP
Intake Valve Diameter 2.150 in
Camshaft Type Hydraulic Roller
Guide Plate Material Hardened Steel
Seat Angle Exhaust 60 deg/Intake 60 deg
Emissions Code
Hazardous Materials Warning WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.
Installation Notes
  • EQUIPPED WITH SPRINGS FOR USE IN HYDRAULIC ROLLER CAMSHAFT APPLICATIONS.; Head bolt holes drilled for stock 7/16" bolts, but can be easily modified for 1/2" bolts or studs by drilling the 1/2" counter bore.; Aftermarket 7/16"-stud rocker arms and 3/8" hardened pushrods required.; Will fit 350-403 Olds with Edelbrock manifold #7111 only (port matching required). Match with Edelbrock head gasket sets.; Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat.; Deck thickness: 5/8"; Rocker stud diameter: 7/16"; Pushrod diameter: 3/8" (width of slot in guide plate).; Cylinder Heads designed for high-performance non-emission 1965-76 Olds 400, 425 and 455 c.i.d. V8's.; Heart shaped chamber for a more efficient burn, outstanding horsepower and torque.; Valvetrain has been upgraded from the factory pedestal-mount system to an ARP 7/16" screw-in stud and 3/8" pushrod.; Slot guide plate for increased valvetrain stability.
Intake Runner Volume 218 cc
Material Aluminum
Push Rod Diameter (Suggested) 0.375 in
Rocker Stud Diameter 0.4375 in
Valve Angle 6 deg
Valve Spring Diameter 1.105 in
Valve Spring Maximum Lift 0.600 in
Valve Stem Diameter 0.3438 in