FEW radiator caps are high-quality, made in Japan, aftermarket components that regulate cooling system pressure to prevent engine overheating. They utilize durable, heat-resistant silicone rubber seals and a spring-loaded valve to maintain optimal pressure, redirect coolant to the overflow tank when necessary, and ensure long-term reliability for various Japanese and Asian vehicles. 

Key Features and Details of FEW Radiator Caps: 

• Manufacturer & Quality: FEW products are produced in Japan, ensuring high quality and reliability. They are often used as reliable alternatives to OEM parts.
• Material: Uses silicon rubber for the pressure valve, which offers superior heat resistance (over 100"C) compared to conventional NBR or EPDM rubbers. This material is resistant to cooling chemicals.
• Function: Regulates system pressure to maintain the correct operating temperature and prevents coolant from boiling over. The spring-loaded mechanism allows excess pressure to escape to the overflow reservoir.