Complete the fuel injector replacement in your 2003-2004 Dodge 5.9L Diesel with a new set of Fuel Injector Lines. In cases with injector failure due to fuel contamination, it is also recommended that you replace your fuel injector lines and other components to not contaminate new components. In some applications fuel injector lines are only designed for a single use and require replacement when being installed with a new fuel injector. Fuel Injector Lines carry fuel from the injection pump or high-pressure common rail (depending on the application) to the fuel injector. Shop XDP today and get new Fuel Injector Lines for your vehicle from industry brands like DTech, Fleece, Dorman, PurePower, Industrial Injection, and more!