PERFORMANCE AIR FILTER 2003-harley-davidson-flstci-heritage-classic-esi5973090 By continuously monitoring the oxygen

By continuously monitoring the oxygen levels in the exhaust gasses

Length of wires stator to grommet 1 : 80 mm

ADVENTURE (3 PCS)

The smaller tread blocks and siping help in wet and snow traction

Transmission gears made of special steel with straight teeth and recalculated ratio

PERFORMANCE AIR FILTER 2003-harley-davidson-flstci-heritage-classic-esi5973090 By continuously monitoring the oxygenK&N replacement air filters are designed to fit right into the standard OEM airbox. No modifications are required by the owner, no jet changes or adjustment of the carburetors is anticipated or suggested. Modification of the standard airbox (example: removing the cover, drilling holes into the side or top) will have a drastic effect on carburation. Modifications will cause the stock system to run lean and reduce horsepower. Keep your motorcycle stock