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 : XA5521 CA9662 AF9662 AF1246 PA5521 A55521 46879, Kit Includes: 10x Air Filter, Kit Variations: K57-100278 K57-100516 K57-100808 K57-101095 K57-101787 K57-102167 K57-102547 K57-102927 K57-103307 K57-103687 KFL-100236 KFL-100492 KFL-101115 KFL-101668 KFL-102202 KFL-102761, Part Reference Numbers : XA5521 CA9662 AF9662 AF1246 PA5521 A55521 46879