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Pontiac Performer & Performer RPM
These cylinder heads are designed for outstanding performance gains in 1962-79 389-455 c.i.d. Pontiac engines. They are patterned after the 1969-70 Ram Air IV Pontiac cylinder head. Performer heads
#60579/#60575 are 50-state emissions legal for 1965-79 vehicles. They feature 87cc combustion chambers designed to maximize performance while using less expensive, low-octane fuel with a streetable 9.5:1 compression ratio. Our Performer RPM heads with the 72cc combustion chamber are for higher compression engines. Performer RPM #60509 is semi-machined and must be finished by a professional head porter. They includes valve guides and seats installed with no intake pushrod holes. Performer RPM #60587 is not port matched or bowl blended and is NHRA accepted for Stock & Super Stock.
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 |
| Made In |
USA |
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Technical Notes: These heads require Ram Air IV (round port) style exhaust manifolds or headers and Edelbrock head bolt kit #8549. Match with Edelbrock head gasket sets on pages 126-128. |
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| Description |
Bare (Single) |
Complete (Single) |
| Performer Pontiac (87cc) (with springs for hydraulic flat tappet cams) |
60569 |
60579 |
| Performer Pontiac (87cc) (with springs for hydraulic roller cams) |
60569 |
60575 |
| Performer RPM Pontiac (72cc) (with springs for hydraulic flat tappet cams) |
60589* |
60599* |
| Performer RPM Pontiac (72cc) (with springs for hydraulic roller cams) |
60589* |
60595* |
| Performer RPM Pontiac (semi-machined) |
60509* |
N/A |
| Performer RPM Pontiac (Stock & Super Stock) |
60587* |
N/A |
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Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench
| #60579 |
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
.700" |
| Intake |
72 |
138 |
198 |
239 |
264 |
275 |
N/A |
| Exhaust |
56 |
106 |
141 |
163 |
175 |
185 |
N/A |
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AMC
