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 : 480329 XA10253 CA11002 AF11002 TA59148 A59148 WA10298, Kit Includes: 4x Air Filter, Kit Variations: K57-101360 K57-101740 K57-102120 K57-102500 K57-102880 K57-103260 K57-103640 K57-103866 K57-103959 K57-104052, Part Reference Numbers : 480329 XA10253 CA11002 AF11002 TA59148 A59148 WA10298