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A.R.T. is now offering a wide body kit and power boost for the 2013 Mercedes-Benz G63 / G65 AMG.

The wide body kit has a new front bumper with built-in spoiler and air intakes, running board covers with LEDs, fender LED flaring and a redesigned rear bumper with double retro-reflector units. The hood has a bi-color look and 19 air intakes, while the off-roader sits on 22-inch alloys covered by 295/35 R22 tires.

A.R.T. has prepared a power boost for the G63 and G65 AMG models by reprogramming the ECU, installing a sport exhaust stainless steel system with triple pipes per sides, as well as high-flow catalytic convertors and more cooling for the transmission, fuel circuit and engine.

As a result, the G63 AMG with its V8 5.5-liter bi-turbo engine now churns 681 HP (500 kW), up from the standard 544 HP (400 kW). The V12 6.0-ltier bi-turbo in the G65 AMG is now delivering 749 HP (550 kW) in comparison to the stock 612 HP (450 kW). Both versions have an electronically-limited torque of 1,000 Nm (737 lb-ft).

Gallery: A.R.T. reveals G streetline 65 for 2013 Mercedes G63 / G65 AMG models with 681 HP

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