The G63 AMG is the coolest of the of the entire G-Class bunch, but even a great car can be improved now and again. The folks over at German Special Customs did just that when they came up with an amazing upgrade kit for the G63 AMG that transforms the off-road machine into something truly bad-ass.

The base G63 AMG pulls power from a 5.5-liter, V-8 biturbo engine that delivers a total of 544 horsepower and 560 pound-feet of torque. That’s well and good, but GSC decided to bump this up by way of reworked software and a modified exhaust system. As a result, the GSC-tuned G63 AMG now delivers a total of 620 horsepower, 1,000 Nm (738 pound-feet) of torque.

In addition to the engine upgrade, the tuner is also offering lots of exterior new parts made in carbon fiber, a new set of wheels and an updated interior with a 320 km/h speedometer.

The G63 AMG also received some upgrades on the outside, but we could definitely live without those. That body kit a bit odd looking, and those low-profile tires on fancy rims all but negate its off-road capabilities.It’s not our cup of tea, but it may strike your fancy...

Click past the jump to read more about the Mercedes-Benz G63 AMG by GSC.

  • 2013 Mercedes-Benz G63 AMG by GSC
  • Year:
  • Make:
  • Model:
  • Engine:
  • Horsepower @ RPM:
  • Displacement:
    5.5 L
  • 0-60 time:
    5.9 sec. (Est.)
  • Top Speed:
    155 mph
  • car segment:
  • body style:

Mercedes-Benz G63 AMG by GSC in Detail

For the new G63 AMG the guys over GSC prepared a multi-part broad construction kit that makes the SUV look wider and sportier. The new kit includes:

Broad Bumper Bar

2013 Mercedes-Benz G63 AMG by GSC Exterior
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Carbon-Fiber Radiator Cowling

2013 Mercedes-Benz G63 AMG by GSC Emblems and Logo Exterior
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LED Daytime Running Lights

2013 Mercedes-Benz G63 AMG by GSC Exterior
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Upgraded Hood With Scoop

2013 Mercedes-Benz G63 AMG by GSC Exterior
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23-Inch Forged Rims

2013 Mercedes-Benz G63 AMG by GSC High Resolution Exterior
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Trapezoidal Side-Exit End Pipes

2013 Mercedes-Benz G63 AMG by GSC High Resolution Exterior
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Press Release

There is hardly any rational motivation to prompt the purchase of a G-class Mercedes Benz. It is neither a fuel-saving marvel, sophisticated in aerodynamics nor is it extremely luxurious or comfortable but rather a pure off-roader without additional flavor enhancer. The G-class transforms into a monster when the V8 biturbo engine beneath the massive engine hood, which has an ex-works cubic capacity of 5,461 ccm, 544 horse power and draws from a maximum torque of 760 Nm performs its duty. One could be forgiven for believing that this G63 AMG was the upper limit of this series. Nothing could be more inaccurate. Mercedes AMG even offers a G65 AMG with 12 cylinders and an unbelievable 612 horse power or 1,000 Nm torque.

2013 Mercedes-Benz G63 AMG by GSC High Resolution Exterior
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The designers of German Special Customs from Chemnitz have developed an optical package befitting its performance. A multi-part broad construction kit ensures not only a clearly more sportive appearance but also strongly expands the broadness of the G-class. On the front, GSC installed a broad bumper bar, a new radiator cowling made of carbon fiber and a set of LED daytime running lights. The engine hood is clearly much more massive thanks to an attachment made of carbon for the improved de-aeration of used engine air. Massive wheelhouse expansions account for the broad appearance of the GSC’s G-class, which runs smoothly into the side skirt in millimeter precision. The trapezoidal end-pipes made of stainless steel, of the company’s own exhaust system with valve control are integrated in the latter. There was also a completely new rear bumper bar to match the front and a gorgeous carbon cover for the spare tire in the rear. The optical package is rounded up with the external mirror made of carbon and fine ventilation slits in the engine hood also made of carbon.

2013 Mercedes-Benz G63 AMG by GSC High Resolution Exterior
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A classical V8 biturbo engine works beneath the engine hood of this G model, which now hits the axle driving shafts with approximately 620 horse power thanks to the reworked software and modified exhaust system. To facilitate the conversion of this performance into species-appropriate propulsion, the technicians of German Special Customs mounted the company’s own 23-inches forged rims fitted with special tires in the format 305/35 R23 on the four ends of the AMG chassis frame.

In addition to a speedometer upgrade to 320 k.p.h., GSC also endowed the interior of the G63 AMG with a complete black/red full-leather fitting and different ornamental carbon parts.

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