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 : 479945 479946 93039 XA10015 XA10016 CA11251 AF11251 AF1620 AF1647 PA6279 TA46279 A46279 A48201 WA10039 WA10253 WA10254, Kit Includes: 12x Air Filter, Kit Variations: K57-100296 K57-100404 K57-100700 K57-100987 K57-101367 K57-101747 K57-102507 K57-102887 K57-103267 K57-103647, Part Reference Numbers : 479945 479946 93039 XA10015 XA10016 CA11251 AF11251 AF1620 AF1647 PA6279 TA46279 A46279 A48201 WA10039 WA10253 WA10254