UNI NU-2377 Air Filter for Motorcycles and ATVsUpgrade your motorcycle or ATV with the UNI NU 2377 Air Filter, designed to fit perfectly in your factory air box just like the original. This air filter is a favorite among competitive riders, providing superior air flow and filtration for optimal performance. With its unique two stage design, you can easily clean and maintain the filter to ensure your engine runs at its best. The UNI NU 2377 features a dual layer of foam that can be serviced