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 : 83018 XA5819 CA10348 AF10348 AF1337 PA5819 A35819 49018, Kit Includes: 12x Air Filter, Kit Variations: K57-100295 K57-100544 K57-100835 K57-101122 K57-101328 K57-101708 K57-102468 K57-102848 K57-103228 K57-103608, Part Reference Numbers : 83018 XA5819 CA10348 AF10348 AF1337 PA5819 A35819 49018