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ACDelco Professional, premium aftermarket Branched Radiator Hoses transport engine coolant from the radiator to the engine, and other accessories, and then back again. They are molded to fit specific applications. They are composed of specially blended materials to help resist electrochemical degradation (ECD), the leading cause of hose failure. ACDelco Professional Branched Radiator Hoses are temperature rated from -40 degrees Fahrenheit to 275 degrees Fahrenheit (-40 degrees Celsius to 135 degrees Celsius). Do not use for fuel or oil transfer applications. These premium aftermarket replacement branched radiator hoses are manufactured to meet your expectations for fit, form, and function.