For many types of applications, Spectre offers this High Performance Racing (HPR) Air Filter. This white media clamp-on filter features a top that houses an inverted cone filter for improved service life and even more enhanced flow potential. Included are adapter rings which can fit 3 inch, 3-1/2 inch, and 4-inch diameter tubes. Only the highest quality materials were used including the oiled synthetic media, urethane, and steel mesh. This filter will allow low restriction, better performance, and long service life. This 5-1/2-inch-tall air filter comes factory pre-oiled and ready to use.