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 : 93914 XA10648 CA12064 AF229J TA41378 A41378 WA10650, Kit Includes: 12x Air Filter, Kit Variations: K57-101521 K57-101901 K57-102661 K57-103041 K57-103421 K57-103801 K57-103924 K57-104017 K57-104110 K57-104203, Part Reference Numbers : 93914 XA10648 CA12064 AF229J TA41378 A41378 WA10650