German tuner G-Power has prepared several upgrade packages for owners of the BMW M3 and M4 models, who think their beloved cars need an extra boost.

The external appearance has not changed much. G-Power has equipped both models with orange 21-inch forged wheels, a new rear wing and a carbon fiber hood, all at an additional cost. What matters most to owners is engine performance, and G-Power offers three levels of improvement. With rear-wheel drive, the G-Power has removed the electronic speed limit and now both models reach a top speed of 205 mph (330 kph), instead of the current 180 mph (290 kph).

Stage 1 delivers an increase in power from standard 503 hp (370 kW) and 479 lb-ft (650 Nm) of torque to 600 hp (441 kW) and 531 lb-ft (720 Nm) of torque. With the addition of Competition.

Stage 2 brings a remapped ECU and a better exhaust system. The power of the 3.0-liter engine has been increased to 650 hp (478 kW) and 574 lb-ft (780 Nm) of torque.

The largest increase in inline-six engine power is offered in the Stage 3 package. This package delivers a whopping 700 hp (515 kW) and 618 lb-ft (840 Nm) of torque.

Source: G-Power