• Forged billet aluminum air cleaner featuring a polycarbonate window allowing you to view the internal working of your air intake system• Forged billet aluminum backing plate with our patented internal hidden breather backing plate technology resulting in no need for external hoses or hardware for a virtually closed loop system• Radius air inlet provides unobstructed airflow into engine• High performance filter is constructed from black pre-oiled cotton for optimum flow and filtration. Filter is washable & re-usable, recharge kits available separately• Each kit includes backing plate, forged filter housing, clear polycarbonate top, filter, gaskets and necessary hardware