Arlen Ness 10 Gauge Inverted Series Air Cleaner Kit For Harley Twin Cam Experience enhanced engine performance with the Inverted Series air cleaner. This meticulously crafted air cleaner boasts a forged billet design, engineered to optimize airflow from every angle, including straight through its face. The product includes a high-performance air filter, showcasing an inverted pleated top for maximum efficiency. Each filter is constructed by hand, utilizing black oiled cotton elements and encased in durable stainless steel mesh for superior protection. Features: Billet aluminum backing plate Integrated crankcase breather for a clean look Radius air inlet for unobstructed airflow Synthetic filter element never needs oiling