G-Power’s GP 63 Bi-Turbo Is An Inconspicuous Mercedes-AMG GT 63 4-Door With 789 HP

G-Power has only been modifying Mercedes products for a few years now, after focusing initially on BMW. However, they have since tuned several AMG variants, with the latest being the Mercedes-AMG GT 63 4-door coupe .

This is a car that, even when stock, comes with 640 PS (630 HP) and 900 Nm (664 lb-ft) of torque if you opt for the flagship 63 S variant. Thanks to G-Power though, you can build on those figures by choosing between three boost levels.

The first is the GP-800, which comes with 800 PS (789 HP) and 1,000 Nm (737 lb-ft) of torque. Responsible for the extra grunt is the GP-800 performance software (€3,595 / $4,040), new turbochargers (€6,390 / $7,180) and downpipes (€5,360 / $6,022), as well as the sports air filters (€238 / $267) and a stainless steel exhaust system (€4,850 / $5,450).

“This improves performance, torque delivery and responsiveness and, at the same time, optimizes engine efficiency and fuel consumption,” claims the tuner.

Read Also: G-Power Pumps Up The Mercedes-AMG GLE 63 S Coupe To 789 HP

The middle tier upgrade package (GP-750) gives you 750 PS (740 HP) and the same 1,000 Nm (737 lb-ft) of torque as with the GP-800 package. The software is 2,995 euros ($3,365), and you also get custom downpipes. Last but not least is the “starter” GP-700 performance package, which provides 700 PS (690 HP) and 950 Nm (700 lb-ft) and costs 2,495 euros ($2,800).

You also get minor cosmetic upgrades, which is why this modded Mercedes-AMG GT 4-door comes with the tuner’s own Hurricane RR forged wheels, which you can get in either 20-inches or 21-inches, at a cost of 7,950 euros ($8,932) and 8,950 euros ($10,056), respectively. Furthermore, a second rim model, the Hurricane RS, is currently in development.