Exactly the M50/52 can make a ton of power stock. I just read about another guy on bimmerforums... stock internal 2.8L (M52) with a MLS gasket. just under 500WHP/TQ on pump gas. He's not the only one there a lots of people making that kinda power on a pretty much stock motor. Add some M3 cams and an OBD I M50 intake mani and u'r well over 500WHP on pump. What more do u need lol
The day an M20 can hit that on stock internals. It'll never happen.