K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. Our stock replacement air filters for street vehicles are covered by K&N's Million-Mile Limited Warranty.

Fitment:
BMW 3.0CSi Base 1971
BMW 3.0Si Base 1971
BMW 3.0Si Base 1975
Porsche 911 Carrera 2 1990
Porsche 911 Carrera 2 1991
Porsche 911 Carrera 2 1992
Porsche 911 Carrera 2 1993
Porsche 911 Carrera 4 1989
Porsche 911 Carrera 4 1990
Porsche 911 Carrera 4 1991
Porsche 911 Carrera 4 1992
Porsche 911 Carrera 4 1993
Porsche 911 RS America 1993
Porsche 911 SC 1978
Porsche 911 SC 1979
Porsche 911 SC 1980
Porsche 911 SC 1981
Porsche 911 SC 1982
Porsche 911 SC 1983
Porsche 911 Turbo 1991
Porsche 911 Turbo 1992
Porsche 911 Turbo 3.6 1993
Porsche 911 Turbo Carrera 1977
Porsche 911 Turbo Carrera 1986
Porsche 911 Turbo Carrera 1987
Porsche 911 Turbo Carrera 1988
Porsche 911 Turbo Carrera 1989
Porsche 930 Turbo 1978
Porsche 930 Turbo 1979