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Marine Duty Performer RPM 454-O & 454-R
- Heavy-duty, 1.89" Inconel exhaust valves provide added durability for marine applications
- Hard anodized black 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
Cylinder Head Specifications |
| Combustion chamber volume |
110cc |
| Intake runner volume |
290cc |
| Exhaust runner volume |
110cc |
| Intake valve diameter |
2.25" |
| Exhaust valve diameter |
1.89" |
| Valve stem diameter |
11/32" |
| Valve guides |
Manganese bronze |
| Deck thickness |
9/16" |
| Valve spring diameter |
Springs Not Included |
| Valve spring maximum lift |
Springs Not Included |
| 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: 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) |
| Marine-Duty Performer RPM 454-0 Oval Port (110 combusion chamber) |
N/A |
61459* |
| Marine-Duty Performer RPM 454-R Rect. Port (118 combustion chamber) |
N/A |
61559* |
| Notes: Valve springs not included. Please consult your camshaft manufacturer when selecting springs to match your camshaft. |
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Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
| #61459 |
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
.700" |
| Intake |
73 |
143 |
208 |
251 |
284 |
299 |
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| Exhaust |
71 |
128 |
153 |
178 |
200 |
218 |
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AMC
Small Block
