ED60555 - EDELBROCK CYLINDER HEAD FITS CHEV BB PERF RPM RECT PORT HYD ROLLER EA

The Edelbrock®#60555 Performer RPM Rectangle Port cylinder head is designed for Big-Block Chevy applications. The Edelbrock®#60555 Performer RPM head is perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed. This cylinder head delivers great throttle response and power from 2500 to 7000 rpm. They also feature the highest quality intake and exhaust valves and valve springs. For use on pre-pollution controlled vehicles only.

Combustion Chamber Volume (cc): 118

Intake Runner Volume (cc): 315cc/300cc

Exhaust Runner Volume (cc): 110cc

Cylinder Head Style: Assembled

Cylinder Head Material: Aluminum

Intake Port Shape: Rectangular

Intake Valve Diameter (in): 2.190 in.

Cylinder Head Finish: Natural

CNC-Machined Combustion Chamber: No

CNC-Machined Intake Runner: No

CNC-Machined Exhaust Runner: No

Combustion Chamber Style: Semi-open

Intake Port Location: Standard

Exhaust Port Shape: Round

Exhaust Port Location: Standard

Intake Valves Included: Yes

Exhaust Valves Included: Yes

Exhaust Valve Diameter (in): 1.880 in.

Valve Springs Included: Yes

Maximum Valve Lift (in): 0.700 in.

Outside Diameter of Outer Spring (in): 1.540 in.

Damper Spring Included: Yes

Number of Springs Per Valve: Dual

Retainers Included: Yes

Retainer Material: Steel

Locks Included: Yes

Lock Style: 7 degree

Valve Stem Seals Included: Yes

Valve Stem Seal Style: Positive stop

Rocker Arm Studs Included: Yes

Rocker Arm Nut Thread Size: 7/16-20 in.

Rocker Arms Included: No

Rocker Arm Nuts Included: No

Guideplates Included: Yes

Guideplate Pushrod Size: 3/8 in.

Valve Cover Mounting Style: Perimeter bolt

Accessory Bolt Holes Drilled: Yes

Intake Valve Angle: 26

Valve Guides Included: Yes

Valve Guide Material: Manganese bronze

Valve Seats Machined: Yes

Valve Seat Machine Style: 3-angle

Valve Seat Material: Ductile iron

Steam Holes Drilled: No

Oiling Style: Through pushrod

Machined for O-Ring: No

Heat Crossover: No

Quantity: Sold individually.

Special Attention: Valve springs are designed for use with a hydraulic roller camshaft.