Genuine OEM Audi Engine Exhaust Valve, part number 059109611AQ. This precision-engineered valve is a vital component within the engine's cylinder head, responsible for controlling the release of spent exhaust gases from the combustion chamber. It operates in conjunction with the camshaft and valve springs to open and close at precise timings. Weighing approximately 0.051 kg and measuring 0.098 meters in length, this valve is manufactured to exact factory specifications. Using a genuine OEM exhaust valve ensures proper sealing, optimal heat resistance, and precise timing, which are crucial for maintaining engine compression, performance, and emissions control.