Vibrant Open Funnel Perf Air Filter (5in Cone O.D. x 5in Tall x 3in inlet I.D.) - Chrome Filter CapVibrant Performance open funnel filters feature an inverted cap design which increases the filter surface area for improved air flow and excellent filtration or airborne particles. Vibrant Performance open funnel filters are not intended for turbo use and are available in Inlet I. D. Diameters ranging from 2. 5* to 4. 5*. Air Filter; 3 in. Inlet ID; 4. 75 in. Filter Cap OD; 6 in. Filter Base OD; 6. 25 in. Height; Open Finnel Performance; Chrome Cap;