Brabus has a reputation for taking Mercedes cars to new levels of insanity. Just last month, the German tuner turned the Mercedes-AMG GLE And GLS into 800-hp super SUVs, but its latest high-performance creation is even more bonkers: presenting the new Brabus 900 Rocket Edition.

Based on the Mercedes-AMG G63, the name is a reference to the absurd amount of horsepower lurking under the hood. As standard, the G63 is powered by a 4.0-liter twin-turbo V8 generating 577 hp and 627 lb-ft of torque, which is more than enough grunt for a large luxury SUV.

For the Rocket 900, Brabus has increased the displacement to 4.5 liters, added larger three-inch downpipes and turbochargers, and remapped the injection, ignition, and boost pressure control of the ECU. As a result, the modified G63 now generates a supercar-rivaling 900 hp and 774 lb-ft of torque.

With more power on tap than a Ferrari F8 Tributo, McLaren 720S, and Lamborghini Aventador S, the super SUV will sprint from 0-60 mph in just 3.7 seconds, while top speed is limited to 174 mph. Not bad for a 2.5-ton SUV: Mercedes-AMG G63s don't get much more extreme than this. Technically, it can go even faster, but the top speed was limited to protect the tires.

To help the more potent V8 breathe easier, air intakes with an illuminated Rocket logo are integrated into the exposed carbon grille. Enhancing the V8 soundtrack is a stainless-steel high-performance exhaust system with actively controlled exhaust valves that makes the V8 sound throatier in Sport mode. If you don't want to wake the neighbors, "Coming Home" mode makes it sound more discrete.

No Brabus project is complete without some sporty exterior enhancements, and this is no exception. A new widebody kit was developed specifically for the Rocket 900, featuring a front spoiler with side flaps, front and rear fender flares, a large rear wing on the roof, and a prominent rear diffuser. These modifications make the G63 four inches wider than the production SUV. The fender flares also make room for a set of custom 24-inch Monoblock Z hi-tech forged wheels. Two colors are available: Stealth Gray or a more mincing Signature Black.

Brabus hasn't left the interior untouched, either. Inside, the seats, trim elements, and footwells are trimmed in black leather with crest-shaped quilting, while other elements feature high-gloss carbon trim. A set of aluminum pedals round off the interior improvements.

Production of the Brabus 900 Rocket Edition is limited to just 25 examples that will be built by the end of 2022, each costing an eye-watering ($573,132).