Aluminum Cylinder Heads for Chevrolets

Small-Block Chevrolet-Street

Performer RPM Small-Block Chevy Heads

Designed for non-emissions 302, 327, 350 and 400 c.i.d. engines up to 1986, these heads made 420 horsepower with the Performer RPM Power Package for small-block Chevys. Available with straight plugs to clear all types of exhaust headers or angled plugs. Performer RPM heads with 64cc combustion chambers improve performance and retain stock compression ratio on 1970 and earlier small-blocks. Hardened pushrods are required, see chart for more specs.

	Chamber Size	Complete	Bare
Performer RPM (angled plugs)	70cc	#6071*	#6061*
Performer RPM (straight plugs)	70cc	#6073*	#6063*
Performer RPM (straight plugs)	64cc	#6089*	#6088*

Performer Small-Block Chevy Heads

Designed for 302, 327, 350, and 400 c.i.d. engines, these heads have the same powerful design and combustion chambers as the straight plug Performer RPM heads plus an exhaust crossover passage for emissions equipment compatibility. These 50-state street legal heads work with the Performer Power Package and provide outstanding street performance. Hardened pushrods required. When using hot air choke carburetors and Performer manifolds with these heads, choke kit #1932 is required. See chart for more specs.

	Chamber Size	Complete	Bare
Street legal Performer	70cc	#6075	#6065
Street legal Performer	64cc	#6090	N/A

Performer Small-Block Chevy Centerbolt Heads

50-state street legal aluminum heads for 1987-95 Chevy 5.7L engines (except LT1, LT4 and LT5 Corvettes) originally equipped with centerbolt valve covers and the 1987 and later intake manifold bolt pattern. The high-velocity intake runner is designed to work with either T.B.I. or Tuned Port Injection systems. The 60cc combustion chamber maintains the stock compression ratio when used with the recommended head gasket. They accept stock centerbolt or Edelbrock aluminum valve covers #4246 and #4247. Available with straight plugs only. See chart for more specs.

	Chamber Size	Complete	Bare
Street legal Performer Centerbolt	60cc	#6085	#6084

Important Notes: Part numbers are for a pair of cylinder heads. When using stock rockers on S/B Chevy Performer & Performer RPM heads, .100" longer than stock pushrods are required. Due to valve-to-cylinder bore interference, S/B Chevy heads may not be used on engines with less than 4" bore (262, 265, 283, 305, 307 c.i.d.) except with camshafts having less than .450" valve lift. Please use Head Bolt Kit #8550 for an easy installation. *Not legal for sale or use on pollution controlled vehicles.

Performer Centerbolt For Corvette

The unique intake runner design of these Edelbrock aluminum heads greatly increases performance with the Tuned Port Injection systems used in the Corvette. The 60cc combustion chamber maintains stock compression ratio when used with the recommended gasket. 50-state street legal, these heads are designed for 1987-91 5.7L Corvettes (except LT1, LT4 and LT5 Corvettes) originally equipped centerbolt valve covers and the early style "straight" manifold bolt pattern. Also fits 1986 Corvette convertibles originally equipped with aluminum heads. Accepts stock centerbolt or Edelbrock valve covers #4246 & #4247. Hardened pushrods required. See chart for more specs.

	Chamber Size	Complete	Bare
Street legal Performer for 5.7L Vettes	60cc	#6087	#6086

Small-Block Chevrolet Race Heads

Big-Block Chevrolet - Street

Performer RPM 454-O

Designed for big-block Chevy 396-502 c.i.d. engines, these oval port heads will support over 540 horsepower with 9.5:1 compression when used as part of the Performer RPM Power Package. A totally unique intake port design yields flow numbers traditionally associated with high performance rectangular port heads, but with the smaller runner size and velocity of an oval port for excellent seat-of-the-pants performance and crisp throttle response. The semi-open chamber design maximizes combustion efficiency with streetable compression ratios. The stainless steel 2.19" intake and 1.88" exhaust valves have smaller-than-stock 11/32" valve stems to promote excellent flow and lighter valve weight. The deck surface and water jackets were specially designed to work with all big-block Chevrolet engine blocks. Heads include top-quality ARP rocker studs. See chart for more specs.

	Chamber Size	Complete	Bare
Performer RPM 454-O	110cc	#6045*	#6044*

Performer 454-O

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 that's capable of over 470 ft/lbs. of torque at 3500 rpm. See chart for more specs.

	Chamber Size	Complete	Bare
Street legal Performer 454-O	110cc	#6047	#6046

Performer TBI

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.

	Chamber Size	Complete	Bare
Street legal Performer TBI	100cc	#6049	#6048

Performer RPM 454-R

Performer RPM rectangular-port heads have specially designed intake and exhaust ports for increased flow and velocity over standard big-block heads. These heads feature a highly-efficient 118cc open-style combustion chamber for maximum performance. Engineered with high-velocity 315cc long and 300cc short intake runners, they are designed for street/high-performance big-block Chevys operating from 3500-7000 rpm. The stainless steel, hardened tip 2.19" intake and 1.88" exhaust valves have smaller-than-stock 11/32" valve stems to promote excellent flow and lighter valve weight. The deck surface and water jackets were specially designed to work with all big-block Chevrolet engine blocks. Heads include top-quality ARP rocker studs, bronze guides and hardened, ductile iron valve seats. See chart for more specs.

	Chamber Size	Complete	Bare
Performer RPM 454-R (complete pair)	118cc	#6055*	#6054*

Big-Block Chevrolet Race Heads

*Not legal for sale or use on pollution controlled vehicles.