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 : 518526 SEE 518525 XA10419 XA10420 CA11888 AF11888 TA31366 A31366 WA9791 WA9792, Kit Includes: 8x Air Filter, Kit Variations: K57-101255 K57-101635 K57-102015 K57-102395 K57-103155 K57-103535 K57-103883 K57-103976 K57-104069 K57-104162, Part Reference Numbers : 518526 SEE 518525 XA10419 XA10420 CA11888 AF11888 TA31366 A31366 WA9791 WA9792