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 : 93934 XA11792 CA12605 TA31440 A31440 WA10907, Kit Includes: 12x Air Filter, Kit Variations: K57-101538 K57-101918 K57-102678 K57-103058 K57-103438 K57-103818 K57-103946 K57-104039 K57-104132 K57-104225, Part Reference Numbers : 93934 XA11792 CA12605 TA31440 A31440 WA10907