Rocker Arms are typically in between the pushrod and the intake and exhaust valves. They allow the pushrods to push up on the rocker arms and therefore push down on the valves. However, in Over Head Cam applications the Cam will ride directly on the Rocker Arm. Model Applicability: passion_Pro Splendor_Pro Splendor_Plus Splendor_PLUS Splendor_NXG Splendor_iSmart HF_DELUXE HF_Dawn HF_100 Passion_Plus