Edelbrock 60459 Performer RPM Cylinder Head- $969.50
For Big Block Chevy V8s
Performer RPM 454-Oval Ports-Complete Assembly
Performer RPM 454-O
- These oval port heads will support over 540 hp with 9.5:1 compression when used as part of the Total Power Package
- Unique oval intake port shape produces flow similar to rectangular ports, but the smaller port size provides excellent seat-of-the-pants performance and crisp throttle response
- Semi-open chamber design maximizes efficiency with streetable compression ratios
- Smaller-than-stock 11/32" valve stems promote excellent flow and lighter valve weight
Cylinder Head Specifications
| Combustion chamber volume | 110cc |
| Intake runner volume | 290cc |
| Exhaust runner volume | 110cc |
| Intake valve diameter | 2.19" |
| Exhaust valve diameter | 1.88" |
| Valve stem diameter | 11/32" |
| Valve guides | Manganese bronze |
| Deck thickness | 9/16" |
| Valve spring diameter | 1.55" |
| Valve spring maximum lift | .700" |
| Rocker stud | 7/16" |
| Guideplate | Hardened steel |
| Pushrod diameter | 3/8" |
| Valve angle | 26° |
| Exhaust port location | Stock |
| Spark plug fitment | 14mm x 3/4 reach, gasket seat |
| Made In | USA |
Technical Notes: Match with Edelbrock head gasket sets. Bare heads will have valve guides and seats installed, but will require final sizing and a valve job to match the valves you will be using. Recommended spark plugs 14mm x 3/4" reach with flat gasket seat (Champion RC12YC).
Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
| #60449 | #60459 | |||||||
| Valve Lift | .100" | .200" | .300" | .400" | .500" | .600" | .700" |
| Intake | 74 | 143 | 207 | 250 | 284 | 309 | - |
| Exhaust | 71 | 128 | 153 | 178 | 200 | 218 | - |
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