
Performer 454-O Oval Port Polished Cylinder Head for Big Block Chevy
This product is no longer available. Please call customer service for assistance at 1-800-345-4545.
- Big Block Chevy 396-502ci
- Valve Springs for Hydraulic Flat Tappet
- Port Volume: 290cc/110cc
- Valve Size: 2.19"/1.88"
- 110cc Combustion Chambers
- Max Lift: .700"
- Polished Finish
- Assembled, Sold Individually

Performer 454-O cylinder heads have the same outstanding features as the Performer RPM heads but with an exhaust crossover passage for a 50-state emissions legal status (E.O. #D-215-16). Match these powerful heads with our Performer manifold, Performer-Plus cam and an Edelbrock square-bore or spread-bore carburetor for a Power Package.Tech Tip: To gain more spark plug clearance, Edelbrock recommends using Champion RC Series plugs such as the RC12YC (P/N 192-49776). They are 0.230' shorter than a conventional spark plug and have a 5/8' hex for easier access.
Valve Lift Intake Exhaust .100' 74 71 .200' 143 128 .300' 207 153 .400' 250 178 .500' 284 200 .600' 309 218 .700' N/A N/A Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28' H2O
Since founder Vic Edelbrock Sr. began building performance intake manifolds in 1938, Edelbrock has grown into one of the most trusted names in American high-performance parts, from carburetors and intake manifolds to cylinder heads, crate engines, and EFI systems. JEGS has spent decades supplying Edelbrock components to racers, engine builders, and street enthusiasts, backing this extensive lineup with in-house technical support, fast shipping, and a Price Match Guarantee so you can choose proven Edelbrock parts with confidence.
Street Legal Performer 454 Oval Cylinder Heads
These oval port heads will support over 540 HP with 9.5:1 compression with the right combination! Unique oval intake port shape produces flow similar to rectangular ports, but the smaller port size provides excellent seat-of-the-pant performance and crisp throttle response. Semi-open chamber design maximizes efficiency with streetable compression ratios. The smaller-than-stock 11/32'' valve stems provide excellent flow and lighter valve weight.
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| 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: | 0.700'' |
| 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 |
Performer High Compression 454 Oval Cylinder Heads
These heads have a 100cc semi-open chamber heads and feature a 1-1/2° rolled over (angle milled) design that improves intake port alignment and provides a smaller combustion chamber without shrouding the valves. They have a 9.2:1 compression with flat-top pistons, making them an outstanding high performance street head. They also have an 8.8:1 compression ratio when used on 1987-Up TBI-equipped 7.4L dished piston motors. These heads produced over 450 ft/lbs torque when combined with Edelbrock's Multi-Point EFI System!
| Combustion Chamber Volume: | 100cc |
| 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: | 0.700'' |
| 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 |



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