Feuling BA Air Cleaner Kit For Harley The Feuling BA Air Cleaner showcases years of advanced top end engine development. Its unique construction extends intake runner length and enhances air flow speed. This provides a higher volume for dynamic airflow balance. Equipped with a high flow billet aluminum velocity stack and reusable air filter, plus a streamlined single-piece billet cage for style and simple installation, this air cleaner transcends traditional designs for improved performance. Features: Lengthens intake runners for increased velocity High performance billet aluminum velocity stack High flow reusable air filter Convertible backing plate works with optional Fueling External Breather Kit, sold separately Made in the USA