Complete the fuel injector replacement in your 2006-2007 Chevy/GMC 6.6L LLY/LBZ Duramax with a new set of Fuel Injector Lines. When repairing injectors due to fuel contamination, it is also recommended that you replace fuel injector lines to avoid contaminating your new fuel injectors. It's always a good idea to replace fuel injector lines when replacing injectors especially after damaged components from fuel contamination. In some applications fuel injector lines are only designed for a single use and require replacement when being installed with a new 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!