The latest rumblings on the Internet suggest Mercedes-Benz is dumping the naturally aspirated 5.5-liter V-8 in the G550 SUV for the all-new, twin-turbo, 4.0-liter V-8 that debuted in the insane G550 4x4².
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Rumormill: Next Mercedes G500 Will Get 422 HP Twin-Turbo V-8
