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 : 97116 XA10599 CA12168 AF654J TA31511 A31511 WA11040, Kit Includes: 7x Air Filter, Kit Variations: K57-101546 K57-101926 K57-102306 K57-102686 K57-103066 K57-103826 K57-103919 K57-104012 K57-104105 K57-104198, Part Reference Numbers : 97116 XA10599 CA12168 AF654J TA31511 A31511 WA11040