Victor Jr Gen V LT1 Chevy Cylinder Head Hydraulic Roller Camshaft

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Edelbrock part #77139 Victor Jr. cylinder heads are complete assemblies designed for 2014-Later Gen V engine applications. The Edelbrock Victor Jr. heads are an excellent upgrade for ultra high-performance on GM Gen V LT1 racing engines.
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The Edelbrock part #77139 Victor Jr. LT1 (Gen V) cylinder head is an excellent upgrade for ultra high-performance on GM Gen V LT1 racing engines. The biggest change and advantage of Victor Jr. is the revised exhaust ports, which have been moved 1.5" horizontally to improve air flow. This revision will require the use of custom exhaust manifolds and headers. They have been designed with high flow intake/exhaust ports and back cut intake valves for improved air flow. The valve position has also been revised to accommodate interlocking valve seat rings and larger valves. The intake valve has been increased to 2.20" diameter and has hollow stem valves with a 45deg seat angle, while the exhaust valve has a diameter of 1.60" and utilizes a 50deg seat angle. It's designed with a thicker deck and more material in the intake, exhaust and port walls for improved strength, durability and for additional porting and deck milling. This cylinder head features fully CNC machined intake ports, combustion chambers and exhaust ports for improved performance. The Victor Jr. retains the stock rocker arm, intake port and spark plug tip location for use with factory components. Like all the other cylinder head, this has been designed, tested and cast from 356 aluminum and heat treated to T-6 specs in our facilities in Southern California to guarantee you get the best from a name you can trust. Looking for custom LT1 headers? Please contact Kooks Exhaust and Headers at (866) 586-5665 for more details about their LT1 headers for the Edelbrock Victor Jr. cylinder head!

Documents & Installation Notes



Manufacturer Edelbrock
Application Application Specific
UPC 00085347771394
Series Victor Jr.
Grade Type Performance
Quantity Sold Individually
Camshaft Type Hydraulic Roller
Horsepower 750+ HP
Availability Note Available to Order
Warranty 12 Months
Seat Angle Exhaust 40 deg/Intake 45 deg
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 59 cc
Deck Height 9.240 in
Deck Thickness 0.7500 in
Intake Valve Diameter 2.20 in
Exhaust Valve Diameter 1.60 in
Guide Plates Included No
Intake Runner Volume 320 cc
Material Aluminum
Push Rod Diameter 0.375 in
Valve Angle Exhaust 11.4 X 1.1 deg/Intake 11.6 x 4.5 deg
Valve Spring Diameter 1.32 in
Valve Spring Maximum Lift 0.700 in
Valve Stem Diameter 0.314961 in