High quality material This heater core bypass hose is made from premium rubber that resists degradation from coolant and temperature changes. It is flexible and easy to shape to fit your vehicle’s needs. Single function design A dedicated bypass for the heater core circuit, routing around the heater hose outlet from the engine water pump to provide a simple, effective solution. Heat resistant performance Designed for high temperature service and prolonged exposure under the hood and to coolant. The special construction ensures durable, long-term performance. Problem solving and reliability Helps prevent engine overheating and coolant leaks by bypassing the heater core. This reliable solution supports safe, efficient vehicle operation. By removing the heater core, the overall mass is significantly reduced, solving the problem at the source. Use scenarios - During heater core maintenance or replacement, use the bypass hose to temporarily or permanently bypass the heater circuit. - In engines with a faulty heater core or recurring coolant leaks, install the bypass to maintain cooling system function and prevent overheating. - In repair, upgrade, or weight-reduction projects where heater core removal is planned, use the bypass hose to simplify the cooling loop.