This topic of "superchargers", "chips", or whatnot from e-bay has been gone over so many times, and they're all mostly scams! If you want the real thing, buy from a trusted, known company, not e-bay. Anyways, if your getting a chip, do it last, chips should be your last mod or else it will mess everything up.

Failure is simply the opportunity to begin again, this time more intelligently.