Elite Motorsports did a 93 octane APR tune on a B8 S4 they had in the shop. They did not get a baseline but B8 S4's tend to put down in the ~320 all wheel horsepower range stock on a dynojet. With the tune, the car hit 357 whp so gains of a little over 30 at all four wheels. Definitely nice, but we have another set of results on a Mustang which show much larger gains. We are guessing that is due to the exhaust on the car and the calibration of this Dyno Dynamics whose correction factor we do not know.