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 : 87885 XA5525 CA9669 AF9669 AF1249 PA5525 A25525 42885, Kit Includes: 12x Air Filter, Kit Variations: K57-100102 K57-100601 K57-100889 K57-101176 K57-101290 K57-101670 K57-102430 K57-102810 K57-103190 K57-103570, Part Reference Numbers : 87885 XA5525 CA9669 AF9669 AF1249 PA5525 A25525 42885