Thanks to its potent 4.0-liter twin-turbo V8, the Mercedes-AMG GT 63 is one of the most powerful four-door coupes on the market. In the standard AMG GT 63, this unit pumps out 577 hp and 590 lb-ft of torque, while the range-topping AMG GT 63 S has 630 hp and 664 lb-ft of torque on tap. But if that still isn't enough power for you, G-Power has given the Mercedes-AMG GT 63 a significant performance boost in its new tuning package.
Dubbed the GP 63 Bi-Turbo, the modified Mercedes-AMG GT 63 S is available with three upgrades, the most powerful of which increases the output to 800 horsepower and a substantial 737 lb-ft of torque, putting the four-door coupe in supercar territory.
With G-Power's modifications, the Mercedes-AMG GT 63 has more power than a Lamborghini Aventador S. This was achieved thanks to a combination of G-Power's GP-800 performance software that costs €3,595 ($4,036), new turbochargers (€6,390/$7,175) and downpipes (€5,360/$6,018) as well as sports air filters (€238/$267) and a stainless steel exhaust system (€4,850/$5,446). G-Power says this "improves performance, torque delivery and responsiveness" and "optimizes engine efficiency and fuel consumption."
No performance specifications have been revealed, but the tuned AMG GT 63 should do the 0-62 mph sprint faster than the stock version, which takes 3.3 seconds in the standard AMG GT 63 and 3.1 seconds in the AMG GT 63 S.
If that's too much power for you to handle, G-Power's mid-range package gives the AMG GT 63 750 hp and 737 lb-ft of torque to play with by installing the GP-750 performance software (€2,995/$3,363) and the G-Power downpipes. The starter package provides 700 hp and up to 700 lb-ft of torque, which is achieved using G-Power's GP-700 performance software (€2,495/$2,801).
Additionally, G-Power's AMG GT 63 can be customized with 'Hurricane RR' forged wheels available in either 20-inch or 21-inch sizes priced at €7,950 ($8,928) and €8,950 ($10,051) respectively. A second set of wheels featuring a filigree multi-spoke design is also in development.