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 : 83728 XA5825 CA10694 AF10694 AF1364 PA5825 A28525 49728, Kit Includes: 7x Air Filter, Kit Variations: K57-100142 K57-100347 K57-100646 K57-100933 K57-101211 K57-101591 K57-101971 K57-102351 K57-102731 K57-103491, Part Reference Numbers : 83728 XA5825 CA10694 AF10694 AF1364 PA5825 A28525 49728