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 : 87341 XA5301 CA8956 AF8956 AF1079 PA5301 A25301 42341, Kit Includes: 2x Air Filter, Kit Variations: K57-100515 K57-100807 K57-101094 K57-101372 K57-101752 K57-102132 K57-102512 K57-102892 K57-103272 K57-103652, Part Reference Numbers : 87341 XA5301 CA8956 AF8956 AF1079 PA5301 A25301 42341