According to many the speed limiter is set at 112 MPH because the stock driveshaft might fail if it goes any faster. I do not know if that is true but I didn't want to find it out myself and replaced it with aluminum one. Cyclone V-6 Mustangs will go 150 MPH pretty easily with the limiter removed from what I have heard. I would not try that with a stock driveshaft though.It looks like I haven't lost any weights. There are already many installed at the back and front. ... then I really think it can't cope with the higher speed. And therefore creates a remaining imbalance. Then an aluminum shaft would be a consideration. This will already be less weight and think balanced even at higher speeds. .... In general, I have to say that such a thing should not be the case with such a car. The lockdown at 180kmh alone is a bad joke.