NEW HU, correct harness, can be picked up at autozone, get the one that says "ford premium sound system" comes with two separate pieces, splice to New HU harness and connect to stang. You have to do the splicing/color matching yourself! UNLESS YOU ARE BLIND AND are missing fingers, than its just as simple as matching colors, and maybe a little bit common sense and readin skills to read words on the wires. Mine is a 2000, have read that the 2001 are a lil more complicated but dont know how true this is. Good luck! Im working on a custom box for my 10 inch sub, its done just going to carpet it and wire the amp up this weekend!