Edelbrock E-CNC 280 Cylinder Head, Complete [Port Volume Intake 280cc | Port Volume Exhaust 85cc | HP Range 500-650 | Exhaust Port Location +.125 | Chamber Volume 69cc | Valve Sizes Intake 2.20" | Valve Sizes Exhaust 1.60" | Camshaft Type Hyd. Roller | Max. Lift 0.680" | Valve Spring Dia. 1.30"] (GM LS3)

FULLY CNC PORTED HIGH-PERFORMANCE DESIGNS For the ultimate in performance, our E-CNC cylinder heads are the answer. 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 cylinder heads are available for small-block Chevy, LS-series Chevy, big-block Chevy and small-block Ford.

IMPORTANT NOTES FOR LS3 CYLINDER HEADS

• E-CNC LS3 cylinder heads are a great general purpose high performance cylinder head for any street- strip LS engine.
• These cylinder heads have a high velocity port compared to stock LS3 cylinder heads, making them an ideal upgrade for any cathedral port or 3.89" bore LS application.
• They feature an improved design and casting that gives cylinder head porters more material to work with compared to stock heads.
• Like all of our other E-CNC cylinder heads, these feature fully CNC'd intake ports, combustion chambers and exhaust ports for improved performance.
• Compatible with stock style rocker arms.
• Features an exhaust port that has been raised 0.125" as well as raised spring pockets that have been machined 0.200" for use with longer valves.
• Valve angle has been rolled to 13.25° and the spark plug position has been revised for improved combustion and efficiency over a stock head.

4-bolt flange