G-Power has officially unveiled their new tuning program for the BMW M5 (F10). Their engines tweaks enable the twin-turbo 4.4-liter V8 to produce 640 PS (471 kW / 631 hp) and 777 Nm (573 lb-ft) of torque.
Nelson Piquet Jr Renato Pirocchi Didier Pironi Emanuele Pirro
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