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 : 524502 XA10423 CA11858 AF11858 AF1663 PA99032 TA28177 A28177 WA10215, Kit Includes: 11x Air Filter, Kit Variations: K57-100066 K57-100363 K57-100662 K57-100949 K57-101573 K57-102333 K57-102713 K57-103093 K57-103473 K57-103853, Part Reference Numbers : 524502 XA10423 CA11858 AF11858 AF1663 PA99032 TA28177 A28177 WA10215