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 : 83739 XA6152 CA10989 AF10989 AF1484 PA6152 A46152 49739, Kit Includes: 12x Air Filter, Kit Variations: K57-100166 K57-100354 K57-100653 K57-100940 K57-101369 K57-101749 K57-102509 K57-102889 K57-103269 K57-103649, Part Reference Numbers : 83739 XA6152 CA10989 AF10989 AF1484 PA6152 A46152 49739