K&N 05-09 VW Passat / 06-08 GTI / 04-08 Audi A3 2.0L-L4 Drop In Air Filter

K&N Replacement High-Flow Air Filters are the original high-flow air filter. Since 1969 K&N Engineering has been designing, manufacturing, and enhancing High-Flow Air Filters for the automotive and motorcycle enthusiast interested in maximizing horsepower and acceleration. K&N also makes filters for thousands of applications, including racing and specialty type air filters and is the only air filter used at the Indianapolis 500 Race.