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 : 97114 XA11717 AF403J TA21509 A21509 WA11038, Kit Includes: 7x Air Filter, Kit Variations: K57-101570 K57-101950 K57-102330 K57-102710 K57-103090 K57-103850 K57-103873 K57-103966 K57-104059 K57-104152, Part Reference Numbers : 97114 XA11717 CA12619 AF403J TA21509 A21509 WA11038