The K&N air filter is custom designed to fit in the factory air box and requires no modifications.
It has an extended seal to make sure no dirt gets between the lid and the base of the airbox housing. It is designed around the stock housing as part of the filter construction for the BMW Factory airbox.
This K&N air filter is designed to increase horsepower while providing excellent engine protection. Installation of this K&N air filter will not void your factory warranty. It is made in the USA, and uses only the finest of materials. This filter is veryt effective because of the type of cotton used, the weave of the individual cotton strands, the woven process, the chemistry of the oil, the oil's viscosity and absorbency along with the structural aspects of the aluminum wire.
Backed by the K&N original Million Mile Limited Warranty it will be the last air filter your BMW will ever need.
Key Features
Proven K&N air filter design that is washable and reusable
