Arlen Ness, Stage 1 Big Sucker air cleaner kit. OEM cover

Plain backing plate. For use with OEM air cleaner cover. Designed to pull in the most air possible under the factory air cleaner cover. The backing plate features a patent-pending hidden breather system and a formed aluminum internal design resulting in more performance with no oil blow-bye issues. The integrated patent-pending oil catch makes sure no oil ever touches the massive perimeter-flow air filter. – Increases Horsepower & Torque – Eliminates Oil Blow-bye Issues Associated with M8 Engines- Red Pre-Oiled High Performance Filter – Patented Oil Catch / Reservoir – Patented Hidden Breather Backing Plate – Aluminum Filter Top Plate Design Eliminates Internal Mounting Hardware – Specially Formed Radius Air Inlet & Air Venturi