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 : XA11968 CA12818 WA10962, Kit Includes: 3x Air Filter, Kit Variations: K57-104228 K57-104231 K57-104234 K57-104237 K57-104243 K57-104246 K57-104249 K57-104252 K57-104255 K57-104258, Part Reference Numbers : XA11968 CA12818 WA10962