This Spectre High Performance Racing (HPR) Air Filter is a red media clamp-on filter that can be used for a wide variety of applications. Using the included adapter rings, this filter can fit 3 inch, 3-1/2 inch, and 4 inch diameter tubes. Manufactured using high quality materials throughout, including oiled synthetic media, urethane, and steel mesh, this washable performance filter is precision engineered for low restriction and better performance. This filter's top houses an inverted cone filter for improved service life and enhanced flow potential. Designed with a triple chrome plated steel top and base, this 9-1/2 inch tall air filter is factory pre-oiled and ready to use.