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 : XA4711 CA10193 AF10193 AF1267 PA4711 A34711 42826, Kit Includes: 2x Air Filter, Kit Variations: K57-100568 K57-100857 K57-101144 K57-101370 K57-101750 K57-102130 K57-102510 K57-102890 K57-103270 K57-103650, Part Reference Numbers : XA4711 CA10193 AF10193 AF1267 PA4711 A34711 42826