Arlen Ness Mini 22 Air Cleaner Kit For Harley Milwaukee-Eight The Mini 22 air cleaner kit packs a punch even with its compact appearance. This performance air cleaner features a 4-1/2 tapered air filter design and angled billet top for increased performance as well as leg clearance for those taller riders out there. Features: 22 angled CNC machined billet top Patent pending hidden breathers are o-ringed at the heads and exits out the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardware Aluminum backing plate Air filter element features 4 layers of premium black pre-oiled cotton for the best in airflow and filtration Air filter element is washable and reusable Includes backing plate, filter assembly, gaskets, O-rings, and needed hardware to mount