Rightio, coming from a mainline owner, the 4wd roller we have IS the heartbreaker. Why? Because we don't park air temp sensors where they shouldn't be, we REGULARLY have the dyno and retardation units checked and calibrated and we don't give a single fcuk, weather its flying or not, about a final hp figure on a dyno. Its a tuning tool, not a sales pitch like so many shops will make it. MPH and weight don't lie, ever. If you want to make 600whp from your cammed, unported, stock headered ve, you came to the wrong place. This is as far as this needs to go, so mr OP, what mph and weight did this car run, and if you want to be technical, give us track temp, elevation and humidity.