The Genuine VW / Audi Timing Chain Kit - 178694 is a comprehensive set of products designed for servicing the timing chain of a car. It includes a variety of components that are necessary for proper maintenance and replacement of the timing chain. The kit contains a timing chain, tensioner, guides, sprockets, bolts, and other related parts. These components are essential for ensuring the smooth and efficient operation of the timing chain, which is responsible for synchronizing the movement of the engine's valves and pistons. This kit is specifically designed for use in Volkswagen and Audi vehicles, but can also be suitable for other car models with similar timing chains. With this kit, car owners can easily and effectively maintain and replace their timing chain, ensuring the longevity and optimal performance of their vehicle's engine.