COMP Cams 19024-16 Ultra-Gold Aluminum Roller Rocker Arms Set for Chevrolet Gen III LS1 EnginesUltra Gold ARC Rockers, LS1 LS6 LS2, 4. 8 5. 3 6. 0L, 1. 72: 1 INCLUDES: 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