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 : 83593 97387 XA10178 XA11947 CA11062 AF11062 AF1570 PA9918 TA28192 A21797 A28192 49593 WA11398, Kit Includes: 2x Air Filter, Kit Variations: K57-100562 K57-100852 K57-101139 K57-101221 K57-101601 K57-101981 K57-102361 K57-102741 K57-103121 K57-103501, Part Reference Numbers : 83593 97387 XA10178 XA11947 CA11062 AF11062 AF1570 PA9918 TA28192 A21797 A28192 49593 WA11398