Originally Posted by mdosu
i know the body panels are a pain to do, but you can't just add an engine and tranny to a 328i and make it an M3, there's more stuff under the panels that stiffen the car.
Probably, yeah. But who cares? Even without that stuff, it is still amazing. Plenty of people mod their cars (such as 335i) with much more power than an S65 and don't do that stuff either. So yeah, not quite as rigid as a factoryE91 M3 would be probably, but its not like the car is going to fall apart drving down the roads or twist in half from the power.