- Engines & Components
- Cylinder Heads
- Edelbrock Big Block Chevy Performer Cylinder Heads
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 |