Shaft Rocker Arm Kit LS3 1.7/1.7 Ratio

The Shaft Rocker Arm Kit LS3 1.7/1.7 Ratio is a precision valvetrain upgrade designed for serious LS engine builders and performance enthusiasts who demand maximum reliability at elevated RPM. This kit replaces factory stamped steel rocker arms with high-strength shaft-mounted components that distribute loads evenly across the cylinder head, reducing flex and ensuring consistent valve actuation.

The 1.7/1.7 ratio indicates that each rocker arm multiplies camshaft lift by 1.7 times, balancing aggressive valve opening with reliable spring pressure control across the RPM range. Shaft-mounted designs lock rocker arms to a common fulcrum shaft, eliminating individual pivot points that can wear or bend under high-load conditions, thus improving valvetrain stability and reducing the risk of valve float.

This rocker arm kit is essential for LS3 engine owners planning to exceed 6,500 RPM or increase boost pressure beyond stock margins. It is compatible with high-lift camshafts and aftermarket intake manifolds, making it a vital component for building high-performance street engines or race motors.