I'm hoping that it stays streetable. One of the reasons we've been keeping in touch with Mike at MRL is because of his reputation for building high HP street motors that don't grenade on you. We know he values his reputation and considers reliability when he configures an engine for every horse he can. That having been said, I have to wonder if this thing will be too much to handle. I guess the more power you get used to the more power you want. The 520 that my 408 produces seems pretty tame to me now.