Mini-Hayabusa – allowed in Germany?

Hello, I’ve been a mini fan for a long time. Recently I browsed around in Youtube.de. Found there a great post from “auto motor & sport”, the topic “mini-hayabusa” was dealt with. Some guy has a Hayabusa motorcycle engine installed in a Mini 1300. Hot device I thought I would buy that now too. But when I let through all the comments I saw a post in the state that such a vehicle in Germany is not allowed. Is that really true? Are there any problems? with the TÜV? Or can I buy a car with Hayabusamotor gently? Video: http://en.youtube.com/watch?v=kvqoA8wyu3w Greetings from the mini fan