Arlen Ness Drift Inverted Series Air Cleaner Kit For Harley The Arlen Ness Drift Inverted Series Air Cleaner Kit optimizes your motorcycles performance with its advanced design. Crafted from forged billet, the air filter cover features a CNC inverted top that serves as a velocity stack, enhancing airflow significantly. Its innovative hidden breather system is cleverly designed to exit at the backing plate, eliminating the need for external hoses or hardware. The kit includes a water-resistant filter enveloped in a stainless steel jacket, with pleats on the top and sides for maximum air intake from all angles and does not require a rain sock. Features: Billet aluminum backing plate Integrated crankcase breather for a clean look Radius air inlet for unobstructed airflow Synthetic filter element never needs oiling