Posted in BMW, BMW M4, BMW Videos, G-Power, Galleries, tuning, video G-Power’s Latest BMW M4 Is A 670 HP Missile Author: Brad Anderson Published Date: April 14, 2017 When the BMW M4 leaves the factory, its 3.0-liter twin-turbo six-cylinder engine delivers 425 hp and 550 Nm of torque. In other words, it’s fast.Read more » Related News 800 HP Evotech BMW M5 Takes On 550 HP M4Even though there's a considerable power output difference between these two tuned BMWs, this long distance drag race was actually… G-Power Unveils Potent 615hp BMW M4 GTS UpgradeDespite being limited to just 700 units worldwide at a cost of double the regular model, the M4 GTS quickly… G-Power Pushes The BMW M4 Convertible To 600 PSIn their quest to modify every new BMW known to man, G-Power came across the M4 Convertible and pushed its… BMW M4 GTS Boosted To 615 PS By G-PowerChoosing a BMW M4 GTS instead of the regular M4 Coupe means that one is into the extra muscle, but…