K&N’s replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. K&N's OEM replacement air filters are covered by their famous K&N Million-Mile Limited Warranty™ and will be THE LAST AIR FILTER YOUR BIKE WILL EVER NEED.