Mercedes B63 620 Widestar by Brabus

Tuning

One of the biggest names in the business further enhances Mercedes' biggest SUV with a widebody kit, power boost and much more.

There are lots of aftermarket tuners out there customizing Mercedes-Benzes, but none has the clout or the experience that Brabus has. Now the German tuning house has released a comprehensive package for the GL-Class sport-ute. Called the Brabus B63 620 Widestar, it's based on the already-potent GL63 AMG, but features a number of upgrades. Chief among them is the widebody extensions that add 8 cm (3.1 inches) of width to the large crossover, incorporating improved ventilation for the engine and brakes while optimizing high-speed stability.

The widebody kit also includes a roof-mounted spoiler, a diffuser and accommodation for the four ceramic-coated tailpipes. And inside those widened fenders sit a new set of Brabus' own 23-inch lightweight alloys that cut 15% of the stock wheels' unsprung mass. Brabus has also re-calibrated the air suspension, dropping its ride height by 30 mm (1.2 inches), and fitted the speedy family-hauler with a more powerful braking system: six-piston calipers gripping 15.9-inch cross-drilled rotors up front and four pistons on 15-inch discs out back. But that's just to keep the extra power under control.

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The Mercedes specialist will also gladly upgrade the 5.5-liter twin-turbo V8 with its PowerXtra module to bump output up from 557 horsepower and 560 lb-ft of torque to 620 hp and 604 lb-ft. As a result, Brabus claims its modified GL63 can now reach 62 mph in 4.7 seconds and top out at an electronically-limited top speed of 174 mph. And of course there is a wide array of customization options for the interior as well, making this beast feel as special as it likely drives.

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