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 : 83730 XA6163 CA10990 AF10990 AF1485 PA6163 A36163 49730 WA9742, Kit Includes: 12x Air Filter, Kit Variations: K57-100174 K57-100425 K57-100721 K57-101008 K57-101376 K57-101756 K57-102516 K57-102896 K57-103276 K57-103656 KFL-100032 KFL-100702 KFL-101281 KFL-101645 KFL-102157 KFL-102716, Part Reference Numbers : 83730 XA6163 CA10990 AF10990 AF1485 PA6163 A36163 49730 WA9742