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 : 528428 XA10492 CA12066 AF12066 AF1711 PA99095 A39166 WA10337, Kit Includes: 8x Air Filter, Kit Variations: K57-100169 K57-100329 K57-100628 K57-100915 K57-101236 K57-101616 K57-101996 K57-102376 K57-103136 K57-103516, Part Reference Numbers : 528428 XA10492 CA12066 AF12066 AF1711 PA99095 A39166 WA10337