Edelbrock 60599 Performer RPM Pontiac Cylinder Head- $1009.50
Designed for outstanding performance gains in 1965-79 389-455 c.i.d. Pontiac engines
Performer RPM Pontiac 389-455-Complete Assembly
Performer RPM Pontiac 389-455
- Designed for outstanding performance gains in 1965-79 389-455 c.i.d. Pontiac engines
- Patterned after the 1969-70 Ram Air IV Pontiac cylinder head
- 72cc version is for higher compression engines
- #60587 is not port matched or bowl blended & is NHRA-accepted for Stock & Super Stock
Cylinder Head Specifications
| Combustion chamber volume | 72cc |
| 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 |
Technical Notes: Semi-machined version must be finished by a professional head porter (includes valve guides and seats installed with no intake pushrod holes). These heads require Ram Air IV (round port) style exhaust manifolds or headers and Edelbrock head bolt kit #8549.
Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench
| #60599 | |||||||
| Valve Lift | .100" | .200" | .300" | .400" | .500" | .600" | .700" |
| Intake | 71 | 143 | 208 | 253 | 272 | 286 | - |
| Exhaust | 69 | 120 | 151 | 173 | 191 | 199 | - |
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