Ensuring you are Ready for the Road Ahead , Gates 31526 Radiator Cap is built to last with its corrosion-resistant, heavy gauge metal. Experience long service life and specific pressure control, while covering a wide range of pressures. With this precise pressure control, no adjustment is required for installation. This Gates radiator cap is designed to raise the radiator fluid’s boiling point in order to prevent premature boiling and overheating in your cooling systems, maintaining your active road time. FleetPride is your First Click in Heavy Duty .