The Genuine VW / Audi Spark Plug Kit - 178585 is a product kit designed specifically for cars from the Volkswagen and Audi brands. It includes a set of spark plugs, which are essential components for the ignition system of a car. The spark plugs are responsible for creating the spark that ignites the fuel in the engine, allowing the car to start and run smoothly. This kit also includes other necessary components such as spark plug wires, ignition coils, and other related parts. These products are crucial for maintaining the proper functioning of a car's engine and ensuring optimal performance. The kit is designed to fit and service a wide range of Volkswagen and Audi car models.