We’re talking here about a hulking 740 horsepower extracted from within the M6’s 4.4-liter V8 engine – so anyone who may look unsatisfied should probably rethink its options.
The aftermarket segment is usually about looks or power, or both. In this case the looks have been handled by default – the Gran Coupe is one of the finest works coming from Bavaria – so the tuner that has power in its name of course needed to prove its worth. The BMW M6 Gran Coupe usually has a feisty 4.4-liter V8 with 560 hp but that didn’t seem to bode well with G-Power. The tuner has something for everyone because it offers more than one power stages and the most intensive one will add another 180 hp (132 kW) for an output of 740 hp (544 kW). This four-door coupe has also gained some torque – from the standard 501 pound-feet (680 Newton meters) to a tire-munching 720 lb-ft (975 Nm). This oomph is enough to deliver the M6 Gran Coupe to 124 mph (200 km/h) in just 10.5 seconds before topping out at 203 mph (325 km/h).
If you’re not looking for the absolute you can have the milder options – G-Power offers more affordable options that bump the pony count to 650 hp and 700 hp, respectively. The flagship pack also adds e bespoke exhaust system for an enhanced soundtrack and added light weighting, as it’s 22 pounds (10 kilograms) lighter.