It's called a sleeper. People used to street race in the 60s with coke bottle hub caps. My buddy just bought an 03 Stang. It's meth injected and has a ProCharger. It makes near 700 hp with the stock wheels and no stickers or retarded body kits. -SLEEPER-
Im sorry but when I think of a sleeper I dont think of a mustang.....I think of something you would never expect to be fast...like a lincoln town car, random buick, etc etc.