G-Power tunes the BMW 550i, 650i, 750i and M5 / M6

Produces up to 740 HP (544 kW) and 910 Nm (671 lb-ft) of torque

G-Power has introduced a variety of tuning packages for BMWs equipped with a twin-turbo 4.4-liter V8 engine.

First up, the M5 and M6 can be equipped with a Bi-Tronik III package that enables them to produce:

• 625 HP (459 kW) and 777 Nm (573 lb-ft) of torque
• 645 HP (474 kW) and 810 Nm (597 lb-ft) of torque
• 680 HP (500 kW) and 890 Nm (656 lb-ft) of torque
• 710 HP (522 kW) and 890 Nm (656 lb-ft) of torque
• 740 HP (544 kW) and 910 Nm (671 lb-ft) of torque

The 550i, 650i and 750i/iL can also be upgraded with the Bi-Tronik III package which increases the output to:

• 490 HP (360 kW) and 685 Nm (505 lb-ft) of torque
• 510 HP (375 kW) and 720 Nm (530 lb-ft) of torque
• 540 HP (397 kW) and 790 Nm (582 lb-ft) of torque
• 560 HP (411 kW) and 810 Nm (597 lb-ft) of torque

In order to get these impressive figures, the cars are equipped with an optimized ECU, upgraded turbochargers and a sports exhaust system - depending on which package is selected. The company can also increase the car's top speed to reflect the added performance.

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Source: G-Power