Vibrant Classic Air Filters MaxFlow Oiled Air Filter (5119) Replacement Air Filter Volant Performance Volant Performance 5120D Volant DryTech 3D Clamp On Conical Air Filter Air Filter (Dry Extendable) For Intake Kit 75 5175 75 5175D S&B OK4WD Vibrant Performance 10925 THE CLASSIC Performance Air Filter, 4" Inlet. Vibrant Performance classic standard air filters feature a 4ply pleated cotton gauze element that allows for significantly more airflow than a stock filter while providing excellent filtration of airborne particulate. Each filter is pre oiled, washable and reusable. Vibrant Performance classic standard air filters are an excellent choice for turbo charged applications and are available in Inlet I. D. Diameters ranging from 2. 25 to 4. 5.