These radiators feature a 16AN O-ring bung that allows the user to choose a -20AN, -16AN, -12AN, or -10AN inlet. these radiators utilize the same port style fittings and O-rings as some oiling systems use for a high-pressure positive seal. O-ring inlet style radiators allow the consumer to choose the correct inlet for their application.
Instructions (PDF)
Learn more about how radiators work and selecting the proper radiator for your vehicle by reading our tech article. Radiator Cooling Performance.