GM LS3 Ultralite R/A Kit - 1.7 Ratio Non-Adj

The GM LS3 Ultralite R/A Kit - 1.7 Ratio Non-Adj is designed for serious engine builders and high-performance mechanics who aim to enhance power delivery and rotational efficiency in LS-platform engines. This rocker arm assembly kit is specifically tailored for LS3 heads, providing the mechanical advantage necessary to maximize valve lift potential while minimizing weight in the valvetrain.

With a fixed ratio of 1.7, this kit effectively amplifies camshaft lift, translating aggressive cam profiles into optimal valve openings for improved cylinder filling and exhaust scavenging. The lightweight design contributes to reduced reciprocating mass and inertial losses, allowing for quicker valvetrain response at high RPMs and less parasitic drag on the crankshaft. The non-adjustable design simplifies setup while ensuring zero lash consistency across the rev range.

This fixed-ratio architecture is particularly beneficial for engines with locked valve timing and carefully chosen cam profiles, which are common in LS3 builds where every fraction of horsepower and millisecond is crucial. Builders focused on achieving peak performance in LS3 platforms—whether for street machines, track cars, or forced-induction applications—will find this kit indispensable for reliable and repeatable performance gains.