I have always stated that the BMW M3 (all generations) and now the BMW M4 are the best platform for tuners to work on.
And to prove my point, the first ever new generation BMW M3 that was sold in the US market already saw some upgrading done to it.
In stock form, the BMW M3 is good for about 425 Hp, which come from a 3.0 liter twin turbo engine. Those are some good numbers, worthy of a BMW M3, but not everybody seems to be happy with just that. So then the owner decided it was time to fiddle with performance.
After some engine tweaking, the BMW M3 is now capable of delivering an astounding 580 Hp. That is quite the improvement, with few tuners managing to get such numbers from a Bimmer. To better manage all those extra horses, the owner also had installed H&R springs and a set of Brembo brakes. A new set of MORR wheels were also added for the complete build.