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 : 87396 87564 XA5397 CA8911 AF8911 AF1121 PA5397 A35397 A54553 42396 42564, Kit Includes: 9x Air Filter, Kit Variations: K57-100115 K57-100496 K57-100788 K57-101075 K57-101459 K57-101839 K57-102219 K57-102599 K57-102979 K57-103359 KFL-100209 KFL-100755 KFL-101310 KFL-101621 KFL-102279 KFL-102838, Part Reference Numbers : 87396 87564 XA5397 CA8911 AF8911 AF1121 PA5397 A35397 A54553 42396 42564