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. 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. 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. Edelbrock pushrods #9632 are recommended. Requires hardened pushrods. Pedestal mount rockers. When using hot air choke Q-Jet carbs, choke kit #1932 is required. Intended for use on small-bore (3.736" - 4.00") 265, 283, 305 & 307 engines. Deck thickness: 9/16", rocker stud diameter: 3/8", pushrod diameter: 5/16" (width of slot in guide plate).

This Part Fits:

Year	Make	Model	Submodel
1965-1978	Pontiac	Bonneville	Base
1976-1978	Pontiac	Bonneville	Brougham
1965-1970,1978	Pontiac	Bonneville	Safari
1965-1967	Pontiac	Catalina	2+2
1965-1978	Pontiac	Catalina	Base
1971-1972	Pontiac	Catalina	Brougham
1965-1978	Pontiac	Catalina	Safari
1965-1970	Pontiac	Catalina	Ventura
1967-1970	Pontiac	Executive	Base
1967-1970	Pontiac	Executive	Safari
1968-1969	Pontiac	Firebird	400
1968-1977	Pontiac	Firebird	Base
1970-1974,1976	Pontiac	Firebird	Esprit
1970-1979	Pontiac	Firebird	Formula
1969-1979	Pontiac	Firebird	Trans Am
1973-1975	Pontiac	Grand Am	Base
1975-1977	Pontiac	Grand LeMans	Base
1975,1977	Pontiac	Grand LeMans	Safari
1965-1974,1976-1977	Pontiac	Grand Prix	Base
1975,1977	Pontiac	Grand Prix	LJ
1975-1977	Pontiac	Grand Prix	SJ
1971-1978	Pontiac	Grand Safari	Base
1971-1974	Pontiac	Grandville	Base
1975	Pontiac	Grandville	Brougham
1965-1966,1968-1973	Pontiac	GTO	Base
1970-1971	Pontiac	GTO	The Judge
1968-1977	Pontiac	LeMans	Base
1972-1974	Pontiac	LeMans	Luxury
1969-1970,1973-1975,1977	Pontiac	LeMans	Safari
1974	Pontiac	LeMans	Safari Luxury
1970-1977	Pontiac	LeMans	Sport
1971	Pontiac	LeMans	T37
1965-1966	Pontiac	Star Chief	Base
1966	Pontiac	Star Chief	Executive
1968,1970	Pontiac	Tempest	Base
1968	Pontiac	Tempest	Custom
1970	Pontiac	Tempest	GT
1968	Pontiac	Tempest	Safari