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 : XA5353 CA9113 AF9113 AF1082 PA5353 A25353 42728, Kit Includes: 12x Air Filter, Kit Variations: K57-100143 K57-100478 K57-100773 K57-101060 K57-101273 K57-101653 K57-102413 K57-102793 K57-103173 K57-103553, Part Reference Numbers : XA5353 CA9113 AF9113 AF1082 PA5353 A25353 42728