Radiator cap for selected Toyota, Honda, Lexus, Subaru, Nissan, Mazda, Mitsubishi, Daihatsu, Suzuki and Acura vehicles listed in the fitment table. NBR NRC-101S is designed to maintain stable cooling system pressure at 1.1 kg/cm2 / 108 kPa. The cap helps prevent coolant boiling, supports proper coolant circulation and protects the cooling system from pressure loss. Made from heat-resistant materials and manufactured to OEM-style dimensions for direct replacement without modification.