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 : 88807 XA5565 CA10162 AF10162 AF1247 PA5565 A55565 46807, Kit Includes: 4x Air Filter, Kit Variations: K57-100154 K57-100574 K57-101150 K57-101439 K57-101819 K57-102199 K57-102579 K57-102959 K57-103339 K57-103719, Part Reference Numbers : 88807 XA5565 CA10162 AF10162 AF1247 PA5565 A55565 46807