K&N AIR FILTER KT-1217 KTM 390 DUKE 2021-2023

K&N filters (made in USA) ensure the best filtering efficiency and maximum air flow.

They replace the original filter, guaranteeing an increase in torque and power, as well as longer engine life.

Indispensable in combination with "open" exhaust systems and / or with additional injection control units.

Unlike normal paper filters, K&N filters do not require replacement at the expected mileage, since it is possible to restore the perfect efficiency of the filter using the special maintenance kit, containing cleaning liquid and spray lubricant (see the "Related Products" section. at the bottom of this page)