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 : 83890 XA5775 CA10488 AF10488 AF1400 PA5775 A35775 49890, Kit Includes: 7x Air Filter, Kit Variations: K57-100106 K57-100554 K57-100845 K57-101132 K57-101425 K57-101805 K57-102185 K57-102565 K57-102945 K57-103705, Part Reference Numbers : 83890 XA5775 CA10488 AF10488 AF1400 PA5775 A35775 49890