NISMO Racing Radiator Cap

The NISMO Radiator Caps will improve the cooling performance by keeping the pressure inside the cooling system high, making it difficult for the cooling water to boil. Compared with standard products with a valve opening pressure of 0.09MPa (0.9kg/cm2), the boiling point increases by about 6 degrees C. Outside diameter - 45mm Operating valve pressure P - 0.13 MPa (1.3 kg/cm2) Seal - Heat-resistant silicone rubber Part Number: 21430-RS013