i drive a 2000 v6 mustang. i just got my 3.73 and truetrac installed in my car, and now my speedometer is off. i was gonna get a dallas mustang speedcal but i heard some bad stuff about it. now im thinking of getting a sct x2 tuner but the problem is how do i EXACTLY use it? i read that you just plug it on the OBD II, but i don't know where that is. i want to buy the tuner just to calibrate my speedometer and tune my car to give it a little bit more HP.

 

Tuner = good.

The OBD 2 port is under your right knee when you sit in your driverseat, and yes you can recalibrate your speedo for the gears with a tuner [8D]

 

thnx! i found it!