Originally Posted by Ghetto2315
I'm hoping for ... a weight reduction of around 500 lbs.
There has been tons of discussion on this point. The car is physically larger and the new base 3 series car F30 is about the same weight as the existing car. BWM M will indeed be placing more emphasis on weight and there will be more aluminum, more high strength steel, more composites and more hollow/lightened parts. But also many parts will need to be heavier and stronger such as transmission, differential, brakes, wheels, engine, etc.