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 : 97385 XA11716 AFJ003 TA21754 A21754 WA11189, Kit Includes: 11x Air Filter, Kit Variations: K57-101231 K57-101991 K57-102371 K57-102751 K57-103131 K57-103511 K57-103901 K57-103994 K57-104087 K57-104180, Part Reference Numbers : 97385 XA11716 CA12654 AFJ003 TA21754 A21754 WA11189