Compact performance air cleaner featuring 4.5* tapered air filter design and angled billet top for increased performance and leg clearance, Hidden breather is 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, Air filter is made from 4 layers of premium black pre-oiled cotton for the best in airflow and filtration, Includes backing plate, filter assembly, gaskets, O-rings and necessary hardware, Filter assembly is CNC-machined from aluminum and backing plate is cast aluminum