Pick up the Alliant AP55177 Remanufactured Fuel Injector from XDP for your 6.7L Diesel ISB/QSB today. This Alliant Remanufactured Fuel Injector is designed to be a direct-fit replacement for the faulty injector in your 6.7L Diesel ISB/QSB. Alliant Power is a trusted name for aftermarket new and remanufactured diesel fuel injection systems, engine components, and repair kits for light-duty and mid-range diesel vehicles.