A buddy of mine owns a 2.7T S4 6 speed all stock except a chip and maybe an exhaust(not sure about the exhaust though.....). He was driving on the interstate and did about 5 runs against a white STI. He said he slowly pulled on it up to about 130 where they let off. The chip raises power to 320hp and 360 torque. I've driven his car and it pulls really strong, but I think aerodynamics is what did the trick.