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Performer RPM 454 Rectangle Port
- Designed for street/high-performance big-blocks operating from 2500-7000 rpm
- Specially designed ports for increased flow and velocity over standard big-block heads
- Highly-efficient 118cc open-style combustion chamber
- High-velocity 315cc long/300cc short intake ports
- Smaller-than-stock 11/32" valve stems promote excellent flow and lighter valve weight
Cylinder Head Specifications |
| Combustion chamber volume |
118cc |
| Intake runner volume |
315cc |
| 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 |
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Technical Notes: Bare heads will have valve guides & seats installed, but will require final sizing & 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.
Notes for all Performer and Performer RPM Big-Block Chevy heads: Spark plug is closer to center of bore, will interfere with high-dome pistons for open chamber heads. Use pistons designed for our heads. Match with Edelbrock head gasket sets. |
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| Description |
Bare (Single) |
Complete (Single) |
| Performer RPM 454-R (with springs for hydraulic flat tappet cams) |
60549* |
60559* |
| Performer RPM 454-R (with springs for hydraulic roller cams) |
60549* |
6555* |
| Performer RPM 454-R with Polished finish (with springs for hydraulic flat tappet cams) |
N/A |
605519* |
| Performer RPM 454-R with Polished finish (with springs for hydraulic roller cams) |
N/A |
605515* |
| Performer RPM (Stock/Super Stock only) |
60547* |
N/A |
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Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
| #60559 |
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
.700" |
| Intake |
76 |
146 |
212 |
255 |
294 |
314 |
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| Exhaust |
70 |
132 |
156 |
181 |
207 |
228 |
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AMC
Small Block
