K&N 04 BMW 525i 2.5L-L6 Drop In Air Filter

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!
K&N's replacement High-Flow Air Filters are designed to increase horsepower while providing exceptional engine protection, and are covered by K&N's No-Hassle Lifetime Limited Warranty.

Fitment:
BMW 525i Base 2004
BMW 525i Base 2005
BMW 525i Base 2006
BMW 525i Base 2007
BMW 525xi Base 2006
BMW 525xi Base 2007
BMW 528i Base 2008
BMW 528i Base 2009
BMW 528i Base 2010
BMW 528i xDrive Base 2009
BMW 528i xDrive Base 2010
BMW 528xi Base 2008
BMW 530i Base 2004
BMW 530i Base 2005
BMW 530i Base 2006
BMW 530i Base 2007
BMW 530xi Base 2006
BMW 530xi Base 2007
BMW Z4 M Coupe 2007
BMW Z4 M Coupe 2008
BMW Z4 M Roadster 2007
BMW Z4 M Roadster 2008