You won't get much performance for $200. You might think about replacing the paper filter with a K&N, and removing the intake silencer to free up a few HP. A cheap fender-well CAI might come in around that price point. You might find a used N2O kit for that.
I'd save some more to get decent mods. Save for a tuner (Diablo, SCT etc), gears, catback exhaust, TB and plenum, Steeda UDPs etc. Thing is, any one of those mods is going to be $200 or more and none, on its own, will give more than a few HP. Ironically, of the mods on that list gears will probably give the best SOTP feel but will add no power...