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Victor Jr Gen III/ IV LS Chevy Cylinder Head Standard Block

Edelbrock part #61339 Victor Jr. LS3 (4-bolt flange) is a complete cylinder head ideal for use in high Performance's street and competition engines that have reached their limit with a stock-style cylinder head design.
The Edelbrock #61339 Victor Jr. LS3 cylinder heads are ideal for use in high performance street and competition engines that have reached their limit with a stock-style cylinder head design. Most aftermarket LS3 cylinder heads on the market today are simply stock head designs with larger ports. Our Victor Jr. LS3 cylinder heads are an all-new ground up design that incorporates subtle changes for improved flow and combustion. These changes were made to improve the limitations encountered in the stock cylinder heads when increasing the performance level of the engine. Changes include a 2.20" diameter intake valve with a canted configuration similar to what is utilized in the GM LT1 Gen V engine. The intake valve change along with the unique port shape produce almost 400cfm peak flow. These cylinder heads also feature fully CNC intake ports, combustion chambers and exhaust ports for consistency and improved performance. All of these changes make these cylinder heads capable of producing 600+ hp on an LS3 engine with stock rocker arms, intake manifold and exhaust manifolds.
• For Standard LS Block
More Information
Manufacturer Edelbrock
Application Application Specific
UPC 00085347613397
Series Victor Jr.
Grade Type Performance
Quantity Sold Individually
Camshaft Type Hydraulic Roller
Horsepower 500-650 HP
Availability Note Available to Order
Warranty 12 Months
Seat Angle Exhaust 39 deg/Intake 37 deg
Emissions Code
EO Number: D-215-98
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
Intake Valve Diameter 2.20 in
Intake Runner Volume 280 cc
Material Aluminum
Push Rod Diameter 0.312 in
Valve Angle Exhaust 11 X 0 deg/Intake 11 x 3 deg
Valve Spring Diameter 1.30 in
Valve Spring Maximum Lift 0.680 in
Valve Stem Diameter 0.314961 in