Air Cleaners/Intakes

Arlen Ness Performance Air Filter Kit - Stage II Increase performance and add style to the engine, Features a performance filter with a pleated top to take in air from the sides and top of the filter for maximum airflow, Filter cover, spacers and clamps are all CNC machined from billet aluminum, Performance air filter is made from high-flow black pre-oiled cotton media , Increased filter height specially designed to increase airflow without reducing leg room , Over 50% more air filter surface area than paper filters found in factory oval air cleaners, Dyno testing has shown up to a 3 horsepower increase after installing the upgrade filter on factory displacement M8 engines; up to 5hp gain for 124* big bore M8 engines, Kit Includes:, One performance filter, One billet air cleaner cover, Four billet spacers, Four clamps, Four mounting bolts, Does not include backing plate. Requires OEM/Harley-Davidson Ventilator? oval backing plate.