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 : 87864 XA44690 CA9953 AF9953 AF1227 A44690 42864, Kit Includes: 7x Air Filter, Kit Variations: K57-100318 K57-100472 K57-100767 K57-101054 K57-101317 K57-101697 K57-102077 K57-102457 K57-102837 K57-103597, Part Reference Numbers : 87864 XA44690 CA9953 AF9953 AF1227 A44690 42864