K&N Replacement Air Filter 10-12 BMW - 135i/335i/335i XDrive/X1 35i 3.0L L6 (E90) 

K&N Replacement High-Flow Air Filters are The Original High-Flow Air Filter.

Since 1969 K&N Engineering has been designing, manufacturing, and enhancing High-Flow Air Filters for the automotive and motorcycle enthusiast interested in maximizing horsepower and acceleration.  Since K&Ns humble beginnings they have designed and manufactured over 2,400 High-Flow Air Filters to fit most modern passenger vehicles and over 500 High-Flow Air Intake Systems to fit vehicles driven by enthusiast minded drivers.  K&N not only has more applications than any other manufacturer of similar product, K&N invented the High-Flow category and the High-Flow Technology that supports it.  K&N also makes thousands of racing and specialty type air filters and is the only air filter used at the Indianapolis 500 Race.

Features

• High Air Flow with Excellent Filtration
• Designed to Increase Horsepower and Acceleration
• Washable and Reusable
• Will NOT Void Vehicle Warranty
• Lasts up to 50,000 miles before cleaning is required depending on driving conditions
• K&N Million Mile Limited Warranty
• Emissions Legal in all 50 US States.
• Economical, a K&N Air Filter Will Last the Life of Your Automobile
• Works with Original Equipment Manufacturer Vehicle Electronics
• Easy High-Performance Add-on
• Environmentally Friendly