These high output alternators that we sell are a Z Specialties Exclusive. They are brand new, not a rebuilt item. We have them custom made and we modify the case so it makes them a plug’n’play unit for your Z. You do have to change the ends of the cables and they come with the alternator. The T plug in doesn’t get used. NOTE: A special heavy duty belt must be purchased with these units. See listing for your year.