Keeps damaging particles from entering the engine and causing increased engine wear, Improves engine response time Protects the operational performance of your engine, Reduces ecological footprint through fuel economy, Boosts fuel economy by 6% to 11%, 98% Efficiency Against Rocks And Other Debris on the Road, Part Reference Numbers : 83020 XA4622 CA9711 AF9711 AF1417 PA4622 A14622 49020, Kit Includes: 12x Air Filter, Kit Variations: K57-100031 K57-100336 K57-100635 K57-100922 K57-101279 K57-101659 K57-102419 K57-102799 K57-103179 K57-103559, Part Reference Numbers : 83020 XA4622 CA9711 AF9711 AF1417 PA4622 A14622 49020