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One of the biggest names in BMW tuning has taken on the M6, and the result is 631 horsepower.
There are lots of companies out there tuning BMW these days, but among the most exciting of them is surely G-Power. The German tuning house regularly produces some of the most wildly fast and powerful Bimmers on the road, and for its latest trick is focusing its attention on the M6 coupe. Just as it has with the M5, G-Power has optimized the 4.4-liter twin-turbocharged V8 engine from 553 horsepower and 501 lb-ft of torque to 631 hp and 568 lb-ft, promising to lift the big coupe's performance right up to supercar levels.
Along with the engine modifications, G-Power has fitted its M6 with a coilover suspension, carbon brakes, quad-tipped titanium exhaust and 21-inch wheels. Unfortunately the tuner has only released these two photos via Facebook, but given that this is the first time it is modifying the 6 Series, we'd expect more to come.