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 : 87725 XA3462 CA12375 CA11960 CA9401 AF9401 AF1139 PA5462 A35462 42725, Kit Includes: 2x Air Filter, Kit Variations: K57-100566 K57-100855 K57-101142 K57-101363 K57-101743 K57-102123 K57-102503 K57-102883 K57-103263 K57-103643, Part Reference Numbers : 87725 XA3462 CA12375 CA11960 CA9401 AF9401 AF1139 PA5462 A35462 42725