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 : 93890 XA10464 CA11411 AF940J AF1690 PA99006 A38193 WA10312, Kit Includes: 12x Air Filter, Kit Variations: K57-100248 K57-100616 K57-100905 K57-101192 K57-101429 K57-101809 K57-102569 K57-102949 K57-103329 K57-103709, Part Reference Numbers : 93890 XA10464 CA11411 AF940J AF1690 PA99006 A38193 WA10312