2.5" SILVER Performance High Flow Cold Air Intake Cone Replacement Dry Air Filter 6 Inch Inlet Velocity Stack Performance Vibrant Performance Vibrant Performance Air Filter "The Classic" Vibrant Classic Air Filters Air Filter (Dry Extendable) For Intake Kit 75 5175 75 5175D S&B OK4WD. 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.