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 : 87846 XA5512 CA9589 AF9589 AF1210 PA5512 A45512 42846, Kit Includes: 7x Air Filter, Kit Variations: K57-100048 K57-100585 K57-100874 K57-101161 K57-101362 K57-101742 K57-102122 K57-102502 K57-102882 K57-103642, Part Reference Numbers : 87846 XA5512 CA9589 AF9589 AF1210 PA5512 A45512 42846