I would NEVER call a Hummer a sleeper for any reason and here's why. The Hummer, especially the H2, is more of a civilian-happy version of the AM General Hummer H1. Hummers are without a doubt, the number one truck that can take on on-road and off-road. You see the military use these. But a Hummer H2 is a truck all jacked up in the air, has a lot of horsepower, and is anything but a daily driver (I mean, come on now). The H2 may look soft to some people, but I don't think I'd see a Hummer be this muscle-car slaughtering machine. And don't get me started on a big ass truck that could literally run over your average or not-so-average sport compact.
So, ANY Hummer is a mean machine regardless. More mean than George Foreman's grilling machine. On the show "Sports Car Revolution," the rockstar Kazzer drove this Comptech Acura RL that packed 300 horsepower. Well now, a front-drive luxury car (or RWD perchance?) tuned by a pretty good team, and put in navigation and all... to me, that's a sleeper no matter what any muscle car fan thinks. No bling. No "rice." It is a luxury car modded to run. You want to mod a serious luxury machine? Try to make something out of the soon-to-be-sacked Mercury Maurauder. This Comptech Acura was painted in a beautiful dark blue color. Of course, Kaz likes his rides in black, and black would make no difference for this car.
Any more sleepers? Any other cars that can blow the doors off anyone?