K&N products are designed and manufactured on-site. K&N® is headquartered in Riverside, California, in a building complex spanning nearly 400,000 square feet, and also operates facilities in Grand Prairie, TX, England, China, and the Netherlands.

Cheaper Isn't Always Better - Get More Airflow with K&N K&N filters offer exceptional airflow to your engine - and more airflow often translates to more efficient fuel burn. Disposable filters aren't typically designed with the performance enthusiast in mind; they are designed to be simple, cheap, and functional.

K&N Engineering, Inc. About K&N Engineering, Inc. K&N Engineering in Riverside California is the world's leading manufacturer of washable performance air filters and air intake systems. K&N invented the reusable high flow cotton air filter in 1969 and has been perfecting the technology ever since.

K&N® washable, reusable High-Flow Air Filters™ feature a state-of-the-art design of layered, oiled cotton media, engineered to provide exceptional engine protection and increase performance. Protect your engine with the filter that millions of drivers have trusted since 1969, from off-road to the on-ramp.

To build a K&N American air filter, employees load air filter molds and filter media into specially designed K&N machines. After a K&N air filter is removed from the mold, excess plastisol or urethane material is trimmed by hand.

Many K&N replacement air filters feature a multilayered cotton gauze media that has been treated with a special grade of oil that makes the strands of the cotton very sticky. The filter is designed to encourage high airflow with superior filtration.

K&N High-Flow Air Filters™ are designed to last for the life of your vehicle, and are protected by a Million-Mile Limited Warranty. With normal use, they can go up to 50,000 miles before a cleaning is needed (the larger conical filters included with K&N intake systems can go up to 100,000 miles between services).

K&N replacement air filters that fit in the factory air box can go up to 50,000 miles before cleaning is required (under normal highway driving conditions), and the larger conical filters included with K&N air intake systems can go up to 100,000 miles before needing to be cleaned (under normal highway driving ...

Riverside, California Founded in 1969, K&N is headquartered in Riverside, California, in a complex of 10 buildings comprising nearly 400,000 square feet. K&N also operates facilities in England, The Netherlands, and China. K&N is owned by Mickey Rourke. K&N Engineering, Inc.

“At K&N, we're proud to be an American-made company, and our commitment to quality, craftsmanship, and innovation is reflected in every product that comes out of our new Grand Prairie facility,” said CEO Randy Bays.

K&N replacement air filters that fit in the factory air box can go up to 50,000 miles before cleaning is required (under normal highway driving conditions), and the larger conical filters included with K&N air intake systems can go up to 100,000 miles before needing to be cleaned (under normal highway driving ...

K&N High-Flow Air Filters™ are designed to last for the life of your vehicle, and are protected by a Million-Mile Limited Warranty. With normal use, they can go up to 50,000 miles before a cleaning is needed (the larger conical filters included with K&N intake systems can go up to 100,000 miles between services).