COMP Cams 19028-16 Ultra-Gold Aluminum Roller Rocker Aar Set 1.72 Ratio for GM GEN IV LS3 L92 L94 L99 EnginesINCLUDES: Full Set of (16) 1. 72 Ratio, Non Adjustable Rockers w Bolts & Mounts Non adjustable, bolt on, Ultra Gold ARC Series Aluminum Rockers are more durable than both stock rockers and other aftermarket aluminum rocker designs. A CNC extruded body provides increased strength and stiffness, which is especially important for higher load springs. The roller tip meanwhile is an upgrade over the stock slider, which is not meant for use with high lift