True Street Motorsports in McKinney did mine.
Prior to that I was running a canned tune which would throw engine codes for my O2 sensors from time to time. Shaun at Truestreet got me an increase in power and made the codes go away.
I would recommend them without hesitation.
'12 base Mustang. A6, tuned, 390 rwhp 352 rwtq. Paper filter
