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 : 87750 XA5553 XA5553A CA9762 AF178J AF9762 AF1311 AF1661 PA5553 A35553 SEE A36116 42750 WA10313, Kit Includes: 6x Air Filter, Kit Variations: K57-100249 K57-100418 K57-100714 K57-101001 K57-101306 K57-101686 K57-102066 K57-102826 K57-103206 K57-103586, Part Reference Numbers : 87750 XA5553 XA5553A CA9762 AF178J AF9762 AF1311 AF1661 PA5553 A35553 SEE A36116 42750 WA10313