Hi there, The ETK I-Series needs a ultra high performance radiator. The high performance radiator it has now is not sufficient enough to cool the highly tuned engine. Normally i limit the engine to 570bhp which almost gets me 1 full lap of the nurburgring before it overheats and that is only just over half the power that engine can withstand. If i set the bhp to 920 which it can handle just fine without blowing up, it overheats in only a few seconds. The ETK I-Series REALLY needs an ultra high performance radiator so you can race the thing for more than a couple laps on any race track. I also created another post about boost by gear which would be a nice addition.