K&N Bmw E90 4cylinder

K&N’s lifetime replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration.

These filters are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. Simply remove the disposable air filter and replace it with a K&N; there is NEVER any cutting or fitting required. Our stock replacement air filters for street vehicles are covered by the famous K&N Million-Mile Limited Warranty and will be THE LAST AIR FILTER YOUR VEHICLE WILL EVER NEED

E-2021
Product Specifications
Product Style: Round Air Filter
Height: 4.587 in (117 mm)
Inner Wire: No
Inside Diameter: 5.039 in (128 mm)
Outside Diameter: 5.118 in (130 mm)
Top Style: Rubber