Edelbrock Performer High-Compression 454-O Oval Port Cylinder Head for Big Block Chevy
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Performer High-Compression Cylinder Heads
Designed for 1987-95 TBI-equipped big-blocks, these new 50-state emissions legal (E.O. #D-215-33) heads have a 100cc combustion chamber for an increase of over one full point of compression to 8.8:1 on 7.4L TBI engines. The result is a dramatic performance improvement in these late-model vehicles. These heads and our Multi-Point EFI on a 7.4L engine made 353 hp and 457 ft/lbs. of torque on the dyno. Available assembled with top-quality components that include 1-piece, stainless steel, 2.19'' intake and 1.88'' exhaust valves, ARP 7/16'' diameter rocker studs and ductile iron seats with a three-angle valve job. Features include stock port locations and 9/16'' thick decks for superior gasket retention. Mark IV rocker arms and valve train parts are required.
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'' | 73 | 71 |
| .200'' | 143 | 128 |
| .300'' | 207 | 153 |
| .400'' | 251 | 178 |
| .500'' | 284 | 200 |
| .600'' | 299 | 218 |
| .700'' | N/A | N/A |
| Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28'' H2O | ||
Specifications:
will this head have any clearance issues with speed pro /sealed power pistons, part # 8kh426cp30?
Will these work on a 1986 454? Compatible with roller camshaft?
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