| Street Legal & Street High-Performance Heads |
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Performer RPM Pontiac
- Designed for 1965-79 389-455 c.i.d. Pontiac engines
- Patterned after the 1969-70 Ram Air IV Pontiac cylinder head
- #60579 heads are 50-state street legal for 1965-79 vehicles
- 87cc combustion chambers are designed to maximize performance with low-octane fuel
and streetable compression ratios such as 9.5:1
- 72cc version is for higher compression engines
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| PERFORMER RPM PONTIAC |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 72cc |
215cc |
2.11"/1.66" |
#60589* |
#60599* |
| 72cc (semi-machined) |
215cc |
2.11"/1.66"(B) |
#60509* |
N/A |
 Notes: Semi-machined version must be finished by a professional head porter (it comes with valve guides
and seats installed with no intake pushrod holes). See Cylinder Heads Specs for information. Match with
Edelbrock head gasket sets. (B) Recommended valve sizes. |
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AMC
Small Block
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