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 : 87188 XA5456 CA9493 AF9493 AF1134 PA5456 A25456 42188, Kit Includes: 9x Air Filter, Kit Variations: K57-100116 K57-100495 K57-100787 K57-101074 K57-101460 K57-101840 K57-102220 K57-102600 K57-102980 K57-103360, Part Reference Numbers : 87188 XA5456 CA9493 AF9493 AF1134 PA5456 A25456 42188