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

Add to Wish List
Out of stock
Fast Shipping Fast Shipping
Tech support Tech Support
Easy returns Easy Returns
High-quality High-quality
Fast Shipping
Fast shipping
Edelbrock prides themselves in ensuring all products are shipped as quickly as possible.
Shipping policy
Tech support
Easy returns
Edelbrock offers a quick and painless return process on all new and unused products.
Return policy
Easy returns
Tech support
Edelbrock Tech Support is second to none. We can answer any of your tech inquiries!
Tech support
High quality
Edelbrock core products are made in the USA offering unsurpassed quality and performance.
About Edelbrock


No reviews added
Write Your Own Review
You're reviewing:E-CNC Big-Block Chevy Oval Port Cylinder Head Hydraulic Roller Springs
Your Rating


The Edelbrock part # 79455 Big Block Chevy E-CNC 325 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 325 FOR B/B CHEVY (OVAL PORT) FEATURES: - Features 24.5° x 4.4° intake valve angle, 15.5° x 4.2° exhaust valve angle - Stock exhaust port locations and spark plug angles have been modified to produce a smooth flame front for increased fuel efficiency and maximum power - Cylinder heads are equipped with high-quality valve springs for valve lifts of up to .700” - Full CNC porting of the combustion chambers as well as the intake and exhaust runners; this improves air-flow and overall performance potential - Equipped with valve springs for use in hydraulic roller applications - Combustion chamber size of 110cc

Documents & Installation Notes



Availability Available
Application Application Specific
GTIN 00085347794553
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 110.0 cc
Deck Height 10.2 in
Deck Thickness 0.562 in
Exhaust Valve Diameter 1.880 in
Guide Plates Included Yes
Intake Runner Volume 303.0 cc
Intake Valve Diameter 2.250 in
Material Aluminum
Push Rod Diameter 0.375 in
Rocker Stud Diameter 0.437 in
Valve Angle 25 deg
Valve Spring Diameter 1.550 in
Valve Spring Maximum Lift 0.700 in
Valve Stem Diameter 0.341 in