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Brabus Builds AMG GT 63 S with 789HP

Brabus Builds AMG GT 63 S with 789HP
By Joseph Coelho

Brabus turns the Mercedes AMG GT 63 S into the ultimate 4-door hot-rod.

https://cimg3.ibsrv.net/gimg/www.mbw...5bdc57ec4f.jpg

What do they upgrade engine wise? Let's rip their tune map :)

From the slideshow:

after it has received the BRABUS PowerXtra B40S-800 performance upgrade that includes a set of turbocharger units with enlarged compressor wheels and reinforced bearings that produce up to 1.6 bar (23 psi) of boost. Along with remapped software and an actively controlled exhaust system, the car generates an additional 161 horsepower and 71 lb-ft of torque over the standard AMG engine

so... stage 2 tune with some PURE turbos = the same thing engine wise? :P