G-Power, the maker of some of the fastest and meanest tuned BMW models around, has presented its first take on the brand-new 2012 M5 sedan [F10].

At the heart of G-Power's tune is BMW's 4.4-liter twin-turbocharged V8 engine that normally produces 560-horsepower and a peak torque of 680 Nm (502 lb-ft) from 1,500 rpm.

After the German company's engineers update the ECU and add a new custom exhaust system, the V8's output is lifted to 640-horsepower and 777Nm (573 lb-ft).[...]

Source: Carscoop