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 : 93906 XA11554 WA10566, Kit Includes: 12x Air Filter, Kit Variations: K57-101222 K57-101602 K57-102362 K57-102742 K57-103122 K57-103502 K57-103899 K57-103992 K57-104085 K57-104178, Part Reference Numbers : 93906 XA11554 CA12292 WA10566