because I gave him cash, and my 10 bolt. Both of our cars are ABS and TCS which is kinda hard to find when it comes to matching rears up on f-bodys so it was a direct swap with no lights on the dash board. His 12 bolt had 4.11’s and mine had 4.10’s so no speed calibration was needed.
and he is selling the car so parting it, and putting it back to stock he will get more money that way.