This is a complete kit to upgrade the main power feed wire from the alternator to the vehicle on most Ford's

In Summary, the OEM wire from the alternator to the vehicle was not designed to carry the added load of higher amp alternators. If you use the stock wires again or not is your choice, but using this large (#4 Gauge) wire kit will add the safe carrying capacity needed for lengths is 48" from end to end including the fuse holder.