My initial testing with the TST velocity stacks is with the M4 exhaust, I will continue to test them with other exhausts that show promise in top end performance. The Akrapovic will be next. Below the video is a dyno runs on its own.
This dyno run shows the gains from changing to the TST velocity stacks. It is the only difference between the two runs. The rest of the set up is M4 exhaust, DB killer in, Sprint filter, Stage 2 Ab mod, and my flash. TST stacks ( blue) , Stock stacks (red)
Below dyno run show the stock stacks vs the TST stacks with the Akrapovic exhaust , more informaion is in the video below it.