Originally Posted by devo
Lastly, there's no way a $2-3k ECU upgrade is going to yield 425 BHP. To get that kind of power you are going to have to invest much more. Remember whatever addtional HP you that you believe is lurking @ the rear wheels is also @ the M's rear wheels.
uh....apparently you haven't seen somehting like this
turbo for the win
ECU+ suspension +rotor and pad upgrade is enough for daily driver
we don't track or street race all day long........I am just saying hopefully BMW will make M3 as fast as it can be when it's out of factory.