K&N Performance Air Filter for KTM Duke 250 / 390
 
K&N's high-flow air filters are available as a replacement for your stock motorcycle air filter element. They are custom engineered to fit your specific application and are designed to provide low restriction and increased performance, while providing excellent engine protection for your motorcycle.
 
* Designed to boost horsepower and torque by 10-15%.
* Direct fit. No modifications required.
* Pleated media provides a large filtration area offering long service intervals
* Multiple layers of oiled woven cotton gauze media offers excellent filtration
* Made in the USA for over 40 years
* Washable & reusable, pre-oiled and ready to ride!
* Million-Mile Limited Warranty.