The Mercedes-AMG GT 63 S four-door coupe is the car you buy when you want a full-fat AMG tire-shredder but your lifestyle demands a vehicle with the practicality of an extra pair of doors. It makes 630 horsepower from its 4.0-liter twin-turbo V8 and can reach 60 mph in just 3.1 seconds. It also looks mean with that Panamericana grille in front and the tapering roofline at the back. Now, two tuning specialists, Brabus and Fostla, have joined forces to create an even hotter version of the GT 63 S. It's not the first time the two tuners have worked together on a Mercedes-AMG. With 800 hp - the same output as the Brabus-tuned AMG E63 S - and Badlands Green paint, it not only has a lot more firepower than the standard model but looks even more aggressive.

With the Brabus PowerXtra B40S-800 package, this hi-po Mercedes now produces 737 lb-ft of torque. Together with 800 horses, that allows it to complete the 0-62 mph sprint in around 2.9 seconds before reaching a top speed of 196 mph. Outside, a Brabus body kit includes elements like a large rear diffuser and special badging, while the Brabus Monoblock Z forged wheels measure 21 inches in front and 22 inches at the back. These are wrapped in Pirelli P Zero tires. An upgraded braking system is also equipped. Fostla's contribution to the project includes the full-body wrap in the distinctive Badlands Green.

Look more closely and you'll spot Copper accents outside, such as on the grille and wheels. The lower section of the doors has black graphics and these are complemented by a black rear wing and black door mirrors. Inside, the most dramatic upgrade is a starry headliner that instantly reminds one of the Starlight headliner found in many Rolls-Royce models. Plenty of carbon-fiber trim and blue ambient lighting create a suitably sporty effect. If BMW's new M5 CS has made Merc's current crop of AMG sedans look a little underendowed, this GT 63 from Brabus and Fostla does more than enough to redress the balance.