But the superchips flashpaq does the same thing as the Hypertech if not more. So I don't see why it would matter which tuner you have as long as it corrects the speedo. Like I said I'm running 33's now with really no problem. Just every once and a while doing u-turns causes the traction control like to turn on. I usually hit the traction control button before I start to drive anyways which fixes the issue.