Re: iTSX or Dyno?
Since you have not listed any mods, i will figure that you have none. First, the itsx is just a tool, you load your custom tune on it, then load it on the car. If you are planing on modding a little at a time, then go with a tuner that comes with ( Tunes for life). If you are doing a complete build, go to a tune shop. I do not care, to carry around a tuner, so I am custom tuned, and i am very happy with it. Been running the same tune for 3 years.
BBK LT's, Catted Xpipe, Sniper tune, UDP's GT500 TB, Ford Racing CAI, CM delete, 4.10, TR6060, 1 piece DS