K&N Performance Air Filters, Air Intakes and Oil Filters. Factory direct K&N replacement air filters, air intakes, oil filters and cabin filters. Cougar Power Motorsport is the official distributor for performance filtration products of K&N. 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 is a world class filtration company selling air filters, oil filters, and air intakes in over 30 countries. K&N sells over 5,000 products designed for cars, trucks, motorcycles, engines, and industrial applications. From their Million Mile Warranty to their Consumer Protection Pledge, K&N stands behind their products and their consumers 100%. The distinctive K&N logo represents performance from one of the original performance companies.