Some of the baddest street cars are sometimes among the most unsuspecting. To any of you who don’t know what a sleeper is, some vehicle owners create sleepers by swapping more powerful engines or making other performance modifications, like adding a supercharger or turbocharger, leaving the external appearance as it came from the factory or sometimes like it came straight from the junkyard. Check out this video from 1320Video of some of the top sleepers with big power!
