K&N Replacement Air Filter BMW F/I CARS 1978-91

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: 1975 BMW 3.0Si Base 1976 BMW 3.0Si Base 1977 BMW 530i Base 1978 BMW 530i Base 1978 BMW 633CSi Base 1978 BMW 733i Base 1979 BMW 528i Base 1979 BMW 633CSi Base 1979 BMW 733i Base 1980 BMW 320i Base 1980 BMW 528i Base 1980 BMW 633CSi Base 1980 BMW 733i Base 1981 BMW 320i Base 1981 BMW 528i Base 1981 BMW 633CSi Base 1981 BMW 733i Base 1982 BMW 320i Base 1982 BMW 528e Base 1982 BMW 633CSi Base 1982 BMW 733i Base 1983 BMW 320i Base 1983 BMW 528e Base 1983 BMW 533i Base 1983 BMW 633CSi Base 1983 BMW 733i Base 1984 BMW 318i Base 1984 BMW 325e Base 1984 BMW 528e Base 1984 BMW 533i Base 1984 BMW 633CSi Base 1984 BMW 733i Base 1985 BMW 318i Base 1985 BMW 325e Base 1985 BMW 528e Base 1985 BMW 535i Base 1985 BMW 635CSi Base 1985 BMW 735i Base 1986 BMW 535i Base 1986 BMW 635CSi Base 1986 BMW 735i Base 1987 BMW 535i Base 1987 BMW 635CSi Base 1987 BMW 735i Base 1988 BMW 535is Base 1988 BMW 635CSi Base 1988 BMW M3 Base 1989 BMW 635CSi Base 1989 BMW M3 Base 1990 BMW M3 Base 1991 BMW M3 Base