Many people use Humvee and Hummer interchangeably, but the story behind the names tells us why these famous off-roaders aren't exactly the same vehicle.
As before, the most crucial MSA upgrade is to the Hummer's wheezing stock diesel or small block gasoline powertrain. Those pitiful V-8s are replaced by a 2006-2007.5 model-year 6.6-liter Duramax ...
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