ok i have a 2004 mustang gt....i want to buy a 2001 used bullit speed cluster

my question is will everything just do itself when i plug in the new cluster??

will my miles stay the same?

or do i got to program the cluster

 

you need to transfer the circuit board on your factory cluster over to the bullitt cluster. it's pretty easy. here's a write up: https://mustangforums.com/forum/4-6l-1996-2004-modular-mustang/419625-how-to-make-mach-or-bullit-gauges-work-in-a-gt.html