K & N Air Filter - YZ250F/450F/FX YA-4518XD Fi2000R O² Standard Model Fuel Processor tunes and adjusts your air/fuel

tunes and adjusts your air/fuel ratio for peak performance instantaneously Can fine-tune the non-acceleration air/fuel curves using the Bluetooth® app Works with stock or modified engines

Sold as right side cover only (see separate listing for left side)

5 db at 4000 rpm

drains auxiliary tank first

K & N Air Filter - YZ250F/450F/FX YA-4518XD Fi2000R O² Standard Model Fuel Processor tunes and adjusts your air/fuelSpecifically designed with special media and dry foam insert for maximum off road protection Engineered to provide increased horsepower and acceleration Unoiled foam pre filter is easy to clean and re use Filter element is pre oiled and ready to ride