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| CYLINDER HEADS - Chevrolet - Big Block - RPM |
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| Street High-Performance Heads |
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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
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| PERFORMER RPM 454-O |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 110cc |
290cc |
2.19"/1.88" |
#60449* |
#60459* |
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| POLISHED PERFORMER RPM 454-O |
| 110cc |
290cc |
2.19"/1.88" |
N/A |
#604519* |
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PERFORMER RPM 454-R
- 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
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| PERFORMER RPM 454-R |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 118cc |
315/300cc (long/short) |
2.19"/1.88" |
#60549* |
#60559* |
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| POLISHED PERFORMER RPM 454-R |
| 118cc |
315/300cc (long/short) |
2.19"/1.88" |
N/A |
#605519* |
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| Marine High-Performance Heads |
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MARINE-DUTY PERFORMER RPM 454-O AND 454-R
- Heavy-duty, 1.89" Inconel exhaust valves provide added durability for marine applications
- Hard anodized to protect the aluminum in the harsh marine environment
- Sold with valves only to allow for valve spring choices
- Match with an Edelbrock Performer RPM manifold, Performer Series 750 cfm marine
carb and Performer RPM cam for proven performance
- Smaller-than-stock 11/32" valve stems promote excellent flow and lighter valve weight
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| PERFORMER RPM 454-O MARINE OVAL PORT |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 110cc |
290cc |
2.25"/1.89" |
N/A |
#61459* |
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| PERFORMER RPM 454-R MARINE RECTANGULAR PORT |
| 118cc |
315/300cc (long/short) |
2.25"/1.89" |
N/A |
#61559* |
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AMC
Small Block
