The K&N Air Filter is a permanent hi-performance air filter which can be cleaned, re-oiled, and used many times over. This low restriction air filter allows the engine to breathe more freely, which means better throttle response as well as more power throughout the rev range. All K&N factory replacement filters are 50-state legal.
Retains OE airbox and replaces OE air filter. Filters are shipped pre-oiled. To clean filter, purchase the K&N recharger kit #99.5000.
Actual part shown in photo.
Quality Performance K&N air filter replacement drop in for all 1996-2001 Audi A4 (B5 Chassis)