7.3 Powerstroke Alliant single stock replacement AD or AE new injector. Core charge required if not sending the cores to us first. We do not charge any other fees to repair your core injectors. Please note some of the other companies charge for bad parts on top of the sale price and do not use new plungers and barrels in their injectors. All cores charges refunded by issuing a check to the customer, with the exception of rusted or coked cores. Coked cores are the result of vegetable oil. Shipping includes a return label for your cores. Build date after 12/98 for AD injectors.