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 : 88917 XA5594 CA9948 AF9948 AF1250 PA5594 A25594 46917, Kit Includes: 12x Air Filter, Kit Variations: K57-100262 K57-100530 K57-100822 K57-101109 K57-101247 K57-101627 K57-102387 K57-102767 K57-103147 K57-103527, Part Reference Numbers : 88917 XA5594 CA9948 AF9948 AF1250 PA5594 A25594 46917