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 : 83185 XA5804 CA10257 AF10257 AF1387 PA5804 A25804 49185, Kit Includes: 8x Air Filter, Kit Variations: K57-100001 K57-100456 K57-100752 K57-101039 K57-101346 K57-101726 K57-102106 K57-102486 K57-103246 K57-103626, Part Reference Numbers : 83185 XA5804 CA10257 AF10257 AF1387 PA5804 A25804 49185