NHRA Big-Block Chevy Rectangular Port Cylinder Head

Special Price $670.46 Regular Price $744.95
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The Edelbrock #60547 Performer RPM Bare NHRA Stock/Super Stock Rectangle Port cylinder heads are designed for Big-Block Chevy applications. These cylinder heads deliver great throttle response and power from 1500 to 6500 rpm.
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The Edelbrock #60547 Performer RPM Bare NHRA Stock/Super Stock Rectangle Port cylinder head is designed for Big-Block Chevy applications. This cylinder head delivers great throttle response and power from 1500 to 6500 rpm. Cast and heat treated at the Edelbrock Foundry and machined at Edelbrock's manufacturing facility in the USA, the Edelbrock head is the best in quality and performance. All Edelbrock cylinder head is designed from scratch using the latest in computer technology by our own highly skilled engineer's. Using highly efficient ports and state-of-the-art combustion chamber shapes, Edelbrock cylinder head offers improved performance throughout the rpm range for great throttle response and top-end horsepower. Top-quality features include threaded inserts in rocker stud and exhaust bolt holes for superior strength and durability, and manganese-bronze valve guides with ductile iron valve seats. These are features that some other companies don't include!

Documents & Installation Notes



Manufacturer Edelbrock
Application Application Specific
UPC 00085347605477
Series Performer RPM
Grade Type Performance
Quantity Sold Individually
Availability Note Available to Order
Warranty 12 Months
Seat Angle Exhaust 45 deg/Intake 45 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
Installation Notes
  • Bare heads will have valve guides & seats installed, but will require final sizing & a valve job to match the valves you will be using.; Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat.; All Performer and Performer RPM Big-Block Chevy heads: Spark plug is closer to center of bore, will interfere with high-dome pistons for open chamber heads.; Use pistons designed for our heads. Match with Edelbrock head gasket sets.; Designed for street/high-performance big-blocks operating from 2500-7000 rpm; Specially designed ports for increased flow and velocity over standard big-block cylinder heads; Highly-efficient 118cc open-style combustion chamber; High-velocity 315cc long/300cc short intake ports; Smaller-than-stock 11/32" valve stems promote excellent flow and lighter valve weight
CNC Ported No
Combustion Chamber Volume 118 cc
Deck Height 10.2 in
Deck Thickness 0.5625 in
Guide Plates Included No
Intake Runner Volume 315 cc
Material Aluminum
Push Rod Diameter 0.375 in
Valve Angle 26 deg