One of the most important components in your engine is the rocker arm; it is also one of the most vulnerable. As the turning point of the valve train, the rocker arm is basically a sophisticated lever that channels radial movement from the cam lobe into linear movement at the valve. This is a highly critical process.

Due to stresses and vibrations, which are more prevalent during high speed operation, rocker arms undergo what is known as "deflection." Severe rocker arm deflection causes inefficient engine performance, and often results in metal fatigue leading to increased wear and friction in the valve train and eventually engine failure.