The BMW M3 CRT and GTS models both come powered by a 4.4-liter V8, which is the focus of G-Power's latest performance upgrade. Two of the most exclusive M3 models in the M Division's stable, the GTS was limited to just 150 units, while just 67 M3 CRT models were built. For those few privileged owners, G-Power is offering an upgrade package that adds a supercharger system, boosting output from 450 hp and 324 lb-ft of torque to 650 hp and 480 lb-ft.

The result is a 0-62 mph time of 4.1 seconds, down from 4.4, with top speed increasing from 180 to 200 mph. G-Power also adds a custom lightweight titanium exhaust, with the whole upgrade coming in at 23,500 Euros.