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 : 93852 XA10628 CA12259 AF172J TA21387 A21387 WA10675, Kit Includes: 2x Air Filter, Kit Variations: K57-101471 K57-101851 K57-102231 K57-102611 K57-102991 K57-103371 K57-103751 K57-103975 K57-104068 K57-104161, Part Reference Numbers : 93852 XA10628 CA12259 AF172J TA21387 A21387 WA10675