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 : 97057 XA11535 CA12072 TA31512 A31512 WA10889, Kit Includes: 2x Air Filter, Kit Variations: K57-101454 K57-101834 K57-102214 K57-102594 K57-102974 K57-103354 K57-103734 K57-103993 K57-104086 K57-104179, Part Reference Numbers : 97057 XA11535 CA12072 TA31512 A31512 WA10889