Performer Centerbolt Cylinder Heads For S/B Chevy & Corvette
Cylinder Head Specifications:
Combustion chamber volume: 60cc
Intake runner volume: 165cc
Exhaust runner volume: 65cc
Intake valve diameter: 2.02"
Exhaust valve diameter: 1.60"
Valve stem diameter: 11/32"
Valve guides: Maganese Bronze
Deck thickness: 5/8"
Valve spring diameter: 1.46"
Valve spring maximum lift: .575"
Rocker stud: 3/8"
Guideplate: Hardened steel
Pushrod diameter: 5/16"
Valve angle: 23°
Exhaust port location: Stock
Spark plug fitment: 14mm x .750 reach, tapered seat
The Small-block Chevy cylinder head is designed for 1987-95 Throttle Body Injected (T.B.I.) and Tuned Port Injected (T.P.I.) 5.7L S/B Chevy engines originally equipped with centerbolt valve covers. Performer centerbolt cylinder heads are 50-state street legal and accept factory centerbolt valve covers. The intake bolt pattern utilizes the 1987-95, 73° angle on the two center bolts. Will maintain stock compression ratio when used with the recommended head gasket.
The Corvette centerbolt cylinder head is designed for 1986-91 Tuned Port Injected (T.P.I) 5.7L small-block Chevy Corvette engines originally equipped with centerbolt valve covers. Performer centerbolt cylinder heads are 50-state street legal and accept factory centerbolt valve covers. The intake bolt pattern utilizes the 1986-91 (straight) 90° angle on all bolts. Spark plugs are angled like stock O.E. heads
EQUIPPED WITH SPRINGS FOR USE IN HYDRAULIC FLAT TAPPET CAMSHAFT APPLICATIONS
INSTALLATION NOTE: 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.
#60859 | #60879: Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O