The Genuine VW / Audi Timing Chain Kit - 178721 is a comprehensive kit of products designed for servicing and maintaining the timing chain system of a car. It includes various components such as guides, tensioners, sprockets, and other necessary parts to ensure the proper functioning of the timing chain. The kit is specifically designed for use in Volkswagen and Audi vehicles, although it may also be compatible with other car brands. It is a genuine product, meaning it is made by the original manufacturer and meets the high-quality standards of the brand. The kit comes with a total of 16 contents, which may include guides, tensioners, sprockets, bolts, washers, gaskets, and other necessary components. These contents are carefully selected and designed to work together to ensure the smooth and efficient operation of the timing chain system in a car. Overall, the Genuine VW / Audi Timing Chain Kit - 178721 is a reliable and convenient solution for maintaining the timing chain system of a car, providing peace of mind and optimal performance for the vehicle.