MANSORY has used its place at the Geneva Motor Show to display their latest creation for the new Mercedes-Benz G63/G65 AMG SUV. Dubbed the Gronos, this package for the German off-roader brings a significant power boost for the AMG’s twin-turbo V8 5.5-liter engine, increasing its output from 544 HP to a jaw-dropping 840 HP. This increase is supported by a custom exhaust system, a new front spoiler with LED daytime running lights, a new rear spoiler, and a carbon fiber spare wheel cover. In case you didn’t already notice, this MB is also sitting on 23-inch ten-spoke alloys and is coated in a Magic Yellow paint job. Inside, the tweaks are just a sharp, with carbon fiber, wood, and leather coating the blacked-out interior with matching yellow contrasting stitching joining an entirely re-designed center console and dashboard. View the results of the entire transformation after the jump and head to MANSORY’s site in the coming months to learn more about this latest kit from MANSORY.