The UMP SUPERFILTER incorporates a unique swirl flow design inside the aluminum air box to help separate the larger dirt particles out before they can even reach the filter. This results in a much longer filter life and increased performance over longer periods. UMP’s filters are developed for the heavy equipment industry. They are a dry paper element and feature a self cleaning action that increases performance for the life of the filter. Plus, forget what you have heard about oiled gauze style filters. With their porous design they flow a lot of air but can’t match the superior filtering capabilities of paper. The filter canister ducts to outside air just like the stock filter does, so you can count on cooler air.