This product is a rocker arm set designed to control the valve motion in your RC vehicle’s engine valve train (on nitro models). It includes the rocker arms that transfer camshaft motion to open and close the intake and exhaust valves. The precision-engineered parts are made from durable materials to withstand high RPM and heat conditions. It is compatible with select Traxxas nitro engine platforms that require this rocker arm configuration. Ideal for maintenance or engine rebuilds, it supports reliable valve timing and smooth engine performance.