Edelbrock Cylinder Head, 79555, E-CNC Big-Block Chevy Rectangle Port Hydraulic Roller

The Edelbrock part #79559 Big Block Chevy E-CNC 355 cylinder head is the ultimate in performance. This cylinder head is fully CNC ported for maximum horsepower and torque, making them ideal for high-performance's street and light duty racing applications. They also feature high-quality lightweight valve springs and heavy duty hardware for maximum lift and maintain the stock exhaust port location. E-CNC 355 FOR B/B CHEVY (RECTANGLE PORT) FEATURES: - This cylinder head delivers maximum horsepower and torque in high Performance's street and light duty racing applications - Full CNC porting of the combustion chambers, intake & exhaust runners; improving air-flow & overall performance potential - This head has a 24.5deg x 4.4deg intake valve angle, 15.5deg x 4.2deg exhaust valve angle and exhaust ports that have been raised 0.125" but are still in the stock location - Spark plug angles have been modified to produce a smooth flame front for increased fuel efficiency & maximum power - combustion chamber size of 118cc - Equipped with valve springs for use in hydraulic roller applications

All Performer and Performer RPM Big-Block Chevrolet heads have spark plugs relocated closer to center of bore which will interfere with high-dome pistons for open chamber heads.

Use pistons designed for our heads

Deck thickness: 9/16", pushrod diameter: 7/16"

Replacement valve part numbers are for sets of 8

Deck thickness: 9/16", rocker stud diameter: 7/16", pushrod diameter: 3/8" (width of slot in guide-plate)