OMG, that is awesome. Especially with the gas door open You know what the setup is? I'm guessing RWD, looks to get sideways pretty easy for AWD, and the steering seems to have much more travel.
I just read an article on this car. They said it has a V10 BMW M5 engine swap. That's gotta be a tight squeeze... The article was somewhere on Jalopnik site
I finded it... http://jalopnik.com/5837190/watch-a-subaru-impreza-with-an-m5-sourced-v10-tear-up-the-track