I was driving along today just like any other day, windows down, came to a stop light, first in line. Next to me was one of those Honda minivan things. The light goes green, and we both take off, not FAST but you know, rather quick like you're on your way to get somewhere...and i swear i could hear a roots style supercharger sound from this van as it was shifting through gears. It sounded just like a Kenny Bell only not quite as loud.