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 : 87389 XA5396 CA9054 AF9054 AF1103 PA5396 A35396 42389, Kit Includes: 9x Air Filter, Kit Variations: K57-100260 K57-100471 K57-100766 K57-101053 K57-101330 K57-101710 K57-102090 K57-102470 K57-102850 K57-103230, Part Reference Numbers : 87389 XA5396 CA9054 AF9054 AF1103 PA5396 A35396 42389