The Mercedes G63 AMG 6x6 is already a fairly nuts vehicle. Besides having an extra set of wheels, its also got a 544-horsepower twin turbo V8 engine.
Apparently there are those for whom even that just isn't enough. For them, Mercedes tuning firm Brabus didn't add more wheels, thankfully, but their engineers did tune the engine to produce 700 horsepower. The same tuning kit is also available for 4-wheeled Mercedes G-wagens.