The Edelbrock #60587 Performer RPM NHRA Stock/Super Stock cylinder heads are designed for outstanding performance gains in 1962-79 389-455 c.i.d. Pontiac engines. They feature 87cc combustion chambers designed to maximize performance while using less expensive, low-octane fuel with a streetable 9.5:1 compression ratio. They are patterned after the 1969-70 Ram Air IV Pontiac cylinder head. Performer RPM #60587 is not port matched or bowl blended and is NHRA accepted for Stock & Super Stock. All Edelbrock Cylinder Heads are 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 heads offer 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!
Specifications:
| Description_ABR |
Cyl. Head |
| Description_ASM |
Pontiac:-:326 (5.3L)/350 (5.7L)/389 (6.4L)/400 (6.6L)/421 (6.9L)/428 (7.0L)/455 (7.4) |
| Description_DEF |
Engine Cylinder Head |
| Description_EXT |
The Edelbrock #60587 Performer RPM NHRA Stock/Super Stock cylinder heads are designed for outstanding performance gains in 1962-79 389-455 c.i.d. Pontiac engines. |
| Description_INV |
Edelbrock Pontiac Cylinder Head |
| Description_MKT |
The Edelbrock #60587 Performer RPM NHRA Stock/Super Stock cylinder heads are designed for outstanding performance gains in 1962-79 389-455 c.i.d. Pontiac engines. They feature 87cc combustion chambers designed to maximize performance while using less expensive, low-octane fuel with a streetable 9.5:1 compression ratio. They are patterned after the 1969-70 Ram Air IV Pontiac cylinder head. Performer RPM #60587 is not port matched or bowl blended and is NHRA accepted for Stock & Super Stock. All Edelbrock Cylinder Heads are 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 heads offer 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! |
| Description_LAB |
NHRA Legal Pontiac Cylinder Head 72cc Bare |
| Description_TRA |
These heads require Ram Air IV (round port) style exhaust manifolds or headers |
| Description_TRA |
Edelbrock head bolt kit #8549 |
| Description_TRA |
Deck thickness: 5/8" |
| Description_TRA |
Rocker stud diameter: 7/16" |
| Description_TRA |
Pushrod diameter: 5/16" (width of slot in guide plate). |
| Guide Plates Included |
No |
| CNC Ported |
No |
| Material |
Aluminum |
| Intake Runner Volume |
215.0 |
| Valve Angle |
14 |
| Grade Type |
Performance |
| Deck Height |
10.250 |
| Push Rod Diameter |
0.312 |
| RGL |
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. |
| Head Casting Number |
31-6056 |
| Combustion Chamber Volume |
72.0 |
| Deck Thickness |
0.625 |
| Length |
9.0000 |
| Width |
12.0000 |
| Height |
26.0000 |
| Weight |
31.0000 |
