This piece loops heater core feed and return from the water pump to bypass the heater core. Great to skip a leaking heater core or just to clean up the engine bay.
3/4" on one side and 5/8" on the other. Common size on many GM water pumps. This Small I.D. Molded Heater Hose is designed to replace OEM coolant hose and provide long, reliable service. The single molded configuration eliminates the need for multiple connections of hoses, adapter and clamps. These hoses are specifically designed for your application to ensure proper fit and function.
Can be cut to make it fit.