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 : XA67 CA192 AF192 AF77 PA67 A30067 42088, Kit Includes: 7x Air Filter, Kit Variations: K57-100077 K57-100431 K57-100727 K57-101014 K57-101248 K57-101628 K57-102008 K57-102388 K57-102768 K57-103528, Part Reference Numbers : XA67 CA192 AF192 AF77 PA67 A30067 42088