Performance Machine Fast Air Intake Replacement Filter K&N Filter element allows for a significant horsepower increase over stock air cleaner. Features: Replacement air filter for Performance Machine FASTair Air Cleaner 308-483, 308-484, 308-485, 308-486, 308-487, 308-488, 308-489, 308-490, 308-491, 632-241, 693-585, 693-587