K&N Engineering Replacement Drop-In Air Filter: BMW 135 / 335 / 535 2006 - 2009

REPLACEMENT ELEMENT/RK-3905 K&N off-road replacement air filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. Generally, no jet changes are required with just a K&N filter element. K&N replacement air filters are washable and reusable and provide high air-flow with excellent filtration.