E-CNC Big-Block Chevy Rectangle Port Cylinder Head Hydraulic Roller Springs

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The Edelbrock part # 79535 Big Block Chevy E-CNC 355 cylinder head is the ultimate in performance. These cylinder heads are fully CNC ported for maximum horsepower and torque, making them ideal for high-performance 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: - These cylinder heads deliver maximum horsepower and torque in high performance street and light duty racing applications - Full CNC porting of the combustion chambers, intake & exhaust runners; improving air-flow & overall performance potential - These heads have a 24.5° x 4.4° intake valve angle, 15.5° x 4.2° 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 110cc - Equipped with valve springs for use in hydraulic roller applications

Documents & Installation Notes



Availability Available
Application Application Specific
GTIN 00085347795352
Availability Note Available to Order
Warranty 12 Months
Emissions Code
Hazardous Materials Warning WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit
Installation Notes
  • Match with Edelbrock head gasket sets . Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat.
CNC Ported Yes
Combustion Chamber Volume 108.0 cc
Deck Height 10.2 in
Deck Thickness 0.562 in
Exhaust Valve Diameter 1.880 in
Guide Plates Included Yes
Intake Runner Volume 355.0 cc
Intake Valve Diameter 2.300 in
Material Aluminum
Push Rod Diameter 0.375 in
Rocker Stud Diameter 0.437 in
Valve Spring Diameter 1.550 in
Valve Spring Maximum Lift 0.700 in
Valve Stem Diameter 0.341 in