Well after 2 trips to the track and only 5 runs with the new set-up TVS/2.60 the MPH is what I was expecting 135-137 but the ET's aren't due to poor 60's 1.49 -1.66 compared to 1.44-1.49 before the TVS.I am running a true trac and it is very unconsistant at this power level as I an all over the place off the line.I have heard good things about the detroit locker and would like to hear from anyone using one on there GT500.