Genuine OEM Audi Rocker Arm Shaft, part number 03G109366A. This precision-engineered shaft is a vital component within the engine's cylinder head, providing support and a pivot point for the rocker arms. It plays a critical role in the valve train assembly, facilitating the opening and closing of engine valves. Located alongside the camshafts, it ensures accurate valve actuation. Weighing 0.278 kg and measuring 0.4 m in length, this shaft is manufactured to strict tolerances. Using a genuine OEM rocker arm shaft ensures proper alignment and durability, which are essential for maintaining precise valve timing and optimal engine performance.