Try Brammo Motor Sports. They sell a little 2-4 liter v8 motor (I can't remember how big the motor was but it was small) and in, street setup it had like a 10k or 11k redline and race was 12k I think. Made 400 hp. I asked how much and I think he said 35k but if thats what you want then there you go. They also sell v12's and such. The one I like makes 1100 hp stock and with a turbo or a blower makes 1500 hp.
http://www.brammo.com/index.php