K&N REPLACEMENT AIR FILTER TO SUIT AUDI S6 C5 AQJ ANK 4.2L V8This K&N replacement air filter is designed to increase horsepower, improve airflow by capturing contaminants and lasts for the entire lifespan of your vehicle. The design of this air filter uses layered, oiled cotton media thus it is washable and reusable. These drop in replacement air filters are specifically designed to fit in your car's factory air box. These filters not only put you at ease as they are easy to install but are also responsible for