Raise the boiling point of your coolant for increased cooling efficiency and prevention of overheating with the Cusco High-Pressure Radiator Cap. Utilizing a reinforced main pressure valve spring and silicon seals, the internal pressure of the radiator is increased, resulting in a higher boiling point.

Cusco’s high-pressure radiator cap operates at 1.3kb/cm2 at zero atmospheric pressure. In theory, the atmospheric pressure of the road surface (approximately 1.0kg/cm2) is added and the pressure is 2.3kg/cm2.

Won’t fit Subaru BRZ, Toyota 86 & Scion FR-S