Specification is 1.1 kilograms per square centimeter
Made in Japan
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HKS High Pressure Radiator Cap Limited Race Edition for most of Mazda, Mitsubishi, Nissan, Subaru's vehicles. In a cooling system, a higher pressure equates to a higher boiling point for the coolant. Higher coolant pressures also transfer heat from the cylinder heads more efficiently. A radiator cap with the high pressure rating that the radiator is designed to accept.