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 : 83902 XA6109 CA10888 AF10888 AF1437 PA6109 A36109 49902, Kit Includes: 2x Air Filter, Kit Variations: K57-100553 K57-100844 K57-101131 K57-101237 K57-101617 K57-101997 K57-102377 K57-102757 K57-103137 K57-103517, Part Reference Numbers : 83902 XA6109 CA10888 AF10888 AF1437 PA6109 A36109 49902