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K&N Engineering invented the high performance cotton gauze air filter in 1969 and continues to build and refine high performance air filters and high flow intake systems in Riverside California. K&N High Flow Intake Systems are covered by K&N’s limited lifetime warranty and are guaranteed to increase horsepower. K&N OE Replacement High Flow Air Filters typically add 1 – 4 horsepower, are washable and reusable, and those intended for street use carry K&N’s limited lifetime warranty.

K&N Engineering Mustang Cold Air Intakes