This Spectre High Performance Racing (HPR) Air Filter is a universal clamp-on cone air filter intended to fit the Spectre Inline Air Box. Manufactured using high quality materials throughout, including oiled synthetic media, urethane, and steel mesh, this washable high flow filter is precision engineered for low restriction and better performance. Compatible with 4 inch intake tubing, this 7 inch tall air filter is factory pre-oiled and ready to use.