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- Edelbrock Performer RPM Aluminum Cylinder Heads for Big Block Chevy
Edelbrock Performer RPM454-R Rectangle Port Aluminum Cylinder Head for Big Block Chevy
350-60549
Items You Need
Performer RPM Aluminum Cylinder Heads - Rectangle Port
Note: The spark plug position and combustion chamber have been optimized for use with flat top or low dome pistons and will interfere with high compression, high dome pistons designed for stock Chevy open chamber heads. If a high compression domed piston is to be used, purchase a piston designed for use with the #350-6055 cylinder head.
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.
Specifications:
Edelbrock Performer RPM Oval Port Cylinder Heads Edelbrock Performer RPM High Compression Oval Port Cylinder Heads Edelbrock Performer RPM Rectangle Port Cylinder Heads Marine Performer RPM Cylinder Heads
These oval port heads will support over 540 hp with 9.5:1 compression when used as part of the Edelbrock Total Power Package. The unique oval intake port shape produces flow similar to rectangular ports, but the smaller port size provides excellent seat-of-the-pants performance and crisp throttle response. The semi-open chamber design maximizes efficiency with streetable compression ratios and the smaller-than-stock 11/32'' valve stems promote excellent flow and lighter valve weight.
These oval port heads are similar to the ones above with 100cc semi-open combustion chambers created by angle milling at a 1.5 degree angle to improve intake port alignment and create a smaller chamber without valve shrouding. They create an ideal street compression ratio of 9.2:1 when used with flat top pistons. Smaller-than-stock 11/32'' valve stems promote excellent flow and lighter valve weight.
These rectangle port heads are designed for street/high-performance big-blocks operating from 2500-7000 RPM. The specially designed ports offer increased flow and velocity over standard big-block heads. These heads feature highly-efficient 118cc open-style combustion chamber and high-velocity 315cc long/300cc short intake ports. Smaller-than-stock 11/32'' valve stems promote excellent flow and lighter valve weight.
The Marine Performer RPM heads feature heavy-duty, 1.89'' Inconel exhaust valves that provide added durability for marine applications. They are hard anodized to protect the aluminum in the harsh marine environment. These heads use smaller-than-stock 11/32'' valve stems to promote excellent flow and lighter valve weight. Match them with an Edelbrock Performer RPM manifold, Performer Series 750 cfm marine carb and Performer RPM cam for proven high-performance!
Oval Port Rectangle Port Combustion Chamber Volume 110cc (Standard)
100cc (High Compression)118cc Intake Runner Volume 290cc 315cc Exhaust Runner Volume 110cc 110cc Intake Valve Diameter 2.19" 2.19" Exhaust Valve Diameter 1.88" 1.88" Valve Stem Diameter 11/32" 11/32" Valve Guides Manganese Bronze Manganese Bronze Deck Thickness 9/16" 9/16" Valve Spring Diameter 1.55" 1.55" Valve Spring Maximum Lift .700" .700" Rocker Stud 7/16" 7/16" Guideplate Hardended Steel Hardended Steel Pushrod Diameter 3/8" 3/8" Valve Angle 26° 26° Exhaust Port Location Stock Stock Spark Plug Fitment 14mm x 3/4 reach, gasket seat 14mm x 3/4 reach, gasket seat Made In USA!
Does Edelbrock 60549 fit your vehicle?
1995 GMC C3500
- Liter: 7.4
- SubModel: SIERRA SL
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: N
1973 CHEVROLET CORVETTE
- Liter: 7.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: Z
1973 CHEVROLET K30 PICKUP
- Liter: 7.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: Z
1972 CHEVROLET KINGSWOOD
- Liter: 7.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: W
1977 GMC K25
- Liter: 7.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: S
1975 CHEVROLET IMPALA
- Liter: 7.4
- SubModel: SPORT
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: Y
1988 CHEVROLET V30
- Liter: 7.4
- SubModel: SCOTTSDALE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: W
1973 CHEVROLET P30 VAN
- Liter: 7.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: Z
1974 CHEVROLET MALIBU
- Liter: 7.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: X
1980 CHEVROLET K20
- Liter: 7.4
- SubModel: SILVERADO
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: W
1982 GMC C2500 SUBURBAN
- Liter: 7.4
- SubModel: SIERRA CLASSIC
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: W
1980 CHEVROLET C30
- Liter: 7.4
- SubModel: CUSTOM DELUXE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Bare; 525-650hp; Rect Intake Port; Std. Exh. Port; 118cc Chamber Vol.; 2.19 Intake/1.88 in. Exh. Valves; Single;Legal For Use On Pre-Pollution Controlled Vehicles; Equipped w/Springs For Use In Hyd. Roller/Flat Tappet Camshaft Applications~ Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: S
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