The Genuine VW / Audi Crankcase Breather Kit - 178138 is a comprehensive set of products designed for use in a car's crankcase breather system. This kit includes various components that are essential for maintaining the proper functioning of the crankcase breather, which is responsible for removing excess gases from the engine's crankcase. The kit includes a variety of parts such as hoses, valves, and filters, which work together to ensure that the engine runs smoothly and efficiently. This kit is suitable for use in both VW and Audi vehicles and is a genuine product from the manufacturer. It is a reliable and high-quality solution for maintaining the health of a car's engine.