The CAI kit itself won't add much performance gains but will make for a louder intake sound similar to the old 4-barrel carburetor. Add a good tuner and the two mod's will make a noticeable difference. Add the cat-back kit and you pick up a little improvement with a significant difference in exhaust tone. The one mod that will make the biggest difference is the tuner. I recommend the SCT X3 or Livewire from 5 Star Tuning. Here's the link:

5 Star Tuning | Custom Dynomemeter Chassis Tuning Products and Services

Welcome to FTE!