I don't believe that that is a realistic goal for any subaru with that kind of budget, and I can't imagine why you would want something like that. If you want that kind of power for less $50k you'd might as well switch vehicles. It would be a lot easier to use a viper or a Z06. a Large displacement, high reving turbo motor would do the trick, although I wouldn't think it could be had for so cheap. Why does it have to be 1000whp? Is the 900whp car they have too slow?