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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
- Performer applications include heat crossover passage for emissions related engines
- 50-state street legal
Cylinder Head Specifications |
| Combustion chamber volume |
110cc |
| Intake runner volume |
290cc |
| Exhaust runner volume |
100cc / 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 3/8" |
| Pushrod diameter |
3/8" |
| Valve angle |
26° |
| Exhaust port location |
Stock |
| Spark plug fitment |
14mm x 3/4 reach, gasket seat |
| Made In |
USA |
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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 are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat. |
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| Description |
Bare (Single) |
Complete (Single) |
| Performer RPM 454-0 (with springs for hydraulic flat tappet cams) |
60449* |
60459* |
| Performer RPM 454-0 (with springs for hydraulic roller cams) |
60449* |
60455* |
| Performer RPM 454-0 with Polished finish (with springs for hydraulic flat tappet cams) |
N/A |
604519* |
| Performer RPM 454-0 with Polished finish (with springs for hydraulic roller cams) |
N/A |
604515* |
| Performer RPM 454-0 (Super Stock only) |
60447* |
N/A |
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PERFORMER RPM 454-O HIGH-COMPRESSION
These new cylinder heads are our latest addition to our popular Performer RPM 454-O cylinder heads for big-block Chevy's with oval ports. These cylinder heads feature a 100cc chamber that is ideal for high-compression applications. The 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. Both the intake and exhaust ports have been profiled for improved air flow. They also have smaller-than-stock 11/32" valve stems for excellent flow and a lighter weight valve. The heat crossover passage is present, but has been blocked, making these heads not legal for use on emissions controlled engines. |
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| Description |
Bare (Single) |
Complete (Single) |
| Performer RPM 454-0 High-Compression (with springs for hydraulic flat tappet cams) |
60429* |
60439* |
| Performer RPM 454-0 High-Compression (with springs for mechanical flat tappet & hydraulic roller cams) |
60429* |
60435* |
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Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
| #60479 |
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
.700" |
| Intake |
74 |
143 |
207 |
250 |
284 |
309 |
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| Exhaust |
71 |
128 |
153 |
178 |
200 |
218 |
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AMC
Small Block
