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 : 93942 XA11539 CA12377 AF12377 PA99267 A31400 WA10859, Kit Includes: 9x Air Filter, Kit Variations: K57-100266 K57-100373 K57-100672 K57-100959 K57-101430 K57-101810 K57-102190 K57-102570 K57-102950 K57-103330, Part Reference Numbers : 93942 XA11539 CA12377 AF12377 PA99267 A31400 WA10859