The MT is the exact same chassis save for the suspension arms, shocks, and dogbones. Gearing is also different. But heres the deal. The reason that the RS4 is so hard to control at high speeds is the slop in the steering. It sways badly. Attached is a link to a 100MPH story with the RS4. And in no way did you neighbors go even close to that fast, so give it up.The 101MPH RS4 Pay close attention to all the modifications and the engine that was used. Sorry but .68 Horses aint gonna do it and that is the stock Horsepower of a Hpi .15.