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 : 87729 XA5433 CA9345 AF9345 AF1135 PA5433 A35433 42729, Kit Includes: 2x Air Filter, Kit Variations: K57-100411 K57-100707 K57-100994 K57-101475 K57-101855 K57-102235 K57-102615 K57-102995 K57-103375 K57-103755, Part Reference Numbers : 87729 XA5433 CA9345 AF9345 AF1135 PA5433 A35433 42729