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 : 87551 XA5395 CA9392 AF9392 AF1102 PA5395 A25395 42551, Kit Includes: 11x Air Filter, Kit Variations: K57-100194 K57-100426 K57-100722 K57-101009 K57-101393 K57-102153 K57-102533 K57-102913 K57-103293 K57-103673, Part Reference Numbers : 87551 XA5395 CA9392 AF9392 AF1102 PA5395 A25395 42551