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 : 87487 87488 XA5314 XA5315 CA8755A CA8756 AF1073 AF8755A AF1052 AF1119 PA5315 A45314 42488 46678, Kit Includes: 9x Air Filter, Kit Variations: K57-100053 K57-100362 K57-100661 K57-100948 K57-101213 K57-101593 K57-101973 K57-102353 K57-102733 K57-103113, Part Reference Numbers : 87487 87488 XA5314 XA5315 CA8755A CA8756 AF1073 AF8755A AF1052 AF1119 PA5315 A45314 42488 46678