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 : 88573 XA5400 CA9269 AF9269 AF1109 PA5400 A55400 46573, Kit Includes: 2x Air Filter, Kit Variations: K57-100398 K57-100694 K57-100981 K57-101467 K57-101847 K57-102227 K57-102607 K57-102987 K57-103367 K57-103747, Part Reference Numbers : 88573 XA5400 CA9269 AF9269 AF1109 PA5400 A55400 46573