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 : 88673 XA5432 CA9360 AF9360 AF1133 PA5432 A35432 46673, Kit Includes: 4x Air Filter, Kit Variations: K57-100002 K57-100444 K57-101027 K57-101345 K57-101725 K57-102105 K57-102485 K57-102865 K57-103245 K57-103625, Part Reference Numbers : 88673 XA5432 CA9360 AF9360 AF1133 PA5432 A35432 46673