The BMC Performance Motorcycle Air Filter for Harley Davidson SOFTAIL FLSTF 1584 FAT BOY 07>17 (1584/2) (Part #FM949/04) is built to unleash superior engine response, acceleration, and filtration. Tested and refined across top motorcycle racing championships including MotoGP and WorldSBK, this filter replaces the standard paper filter to dramatically reduce intake restriction.

Featuring oiled cotton gauze elements housed in a precision-molded pliable rubber frame, it ensures a tight, vibration-resistant seal within the bike's airbox. It effectively captures particles down to 7 microns while allowing significantly greater volume of clean air to reach the combustion chamber.

Key Features:

• Precision fitment for Harley Davidson SOFTAIL FLSTF 1584 FAT BOY 07>17 (1584/2)
• High-permeability oiled cotton filtration media for rapid throttle response
• Seamless one-piece molded frame designed to withstand motorcycle engine vibrations
• Washable and reusable with lifetime serviceability
• Compatible with factory ECU mapping and performance tuning
• Engineered and manufactured in Italy