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 : 93938 XA11884 CA12665 AF12665 TA41444 A41444 WA10906, Kit Includes: 6x Air Filter, Kit Variations: K57-101533 K57-101913 K57-102293 K57-103053 K57-103433 K57-103813 K57-103938 K57-104031 K57-104124 K57-104217, Part Reference Numbers : 93938 XA11884 CA12665 AF12665 TA41444 A41444 WA10906