G-Power unleashes 670 PS in the BMW M850i xDrive

The German tuner has launched two tuning kits for the BMW M850i xDrive Coupe that let it pull ahead of the M8 flagship without breaking a sweat.

In its stock form, the M850i enjoys 530 PS (523 hp / 390 kW) and 750 Nm (553 lb-ft) of torque. The company replaces multiple exhaust system components and fine-tunes the engine to lift the output to 670 PS (661 hp / 493 kW) and 900 Nm (664 lb-ft) of torque. In order to prevent the V8 from overheating, a GP Venturi RR hood cover made from carbon fiber is also necessary.

Those who would like to cut some corners can just opt for the software upgrade and still get 620 PS (611 hp / 456 kW) alongside 850 Nm (627 lb-ft) of torque. Those willing to go an extra mile can get a carbon-fiber rear wing, 21-inch forged wheels, and height-adjustable suspension.

BMW M8 owners shouldn’t feel left out, however: G-Power has a tuning kit for that one as well, which makes it even more powerful than this M850i (watch the video for a brief overview).