Well that all depends on how wild you want to go and how much money you have. Myself on my wifes car so far I added an Airaide CAI kit and the
Flowmaster axle back exhaust. The only other pwr adders it will get will be a TB spacer and a tune probably from Diablo Sport. Which leads me to a question with those 4 things what sounds like a reasonable total gain from that.....20-30hp maybe?