This engine coolant reservoir hose is designed to match the function of the original hose connecting the radiator or engine to the reservoir on specified vehicles. It is engineered to help ensure proper coolant flow to and from the coolant system. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Ram 2500: 2013, 2014, 2015, 2016, 2017, 2018] - [Ram 3500: 2013, 2014, 2015, 2016, 2017, 2018] - [Ram 4000: 2013] - [Ram 4500: 2013, 2014, 2015, 2016, 2017, 2018] - [Ram 5500: 2013, 2014, 2015, 2016, 2017, 2018]