Weistec apparently have sorted their issues and say they can deliver the new supercharger upgrade. I wonder if any will make it to the UK?
Article: Weistec M113 Kompressor (55 AMG) supercharger upgrade dynographs and video - 562 wheel horsepower 91 octane
Article: Weistec M113 Kompressor (55 AMG) supercharger upgrade dynographs and video - 562 wheel horsepower 91 octane