K&N BMW Drop In Air Filter

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 318ti Base 1999 BMW 323Ci Base 2000 BMW 323i Base 1999 to 2000 BMW 325Ci Base 2001 to 2006 BMW 325i Base 2001 to 2005 BMW 325xi Base 2001 to 2005 BMW 328Ci Base 2000 BMW 328i Base 2000 BMW 330Ci Base 2001 to 2006 BMW 330i Base 2001 to 2005 BMW 330xi Base 2001 to 2005 BMW M3 Base 2001 to 2006 BMW X3 2.5i 2004 to 2005 BMW X3 3.0i 2004 to 2006