Hey all. I boosted my NA about 8k ago... I'm running a manual tranny though which is far more forgiving... to the OP. Since you have already added a CAI and the dealer will probably notice it, you should just plan on buying out your lease. Being an automatic though, boosting is very tricky. You can do it, and you can comfortably run 6psi without issue, as long as you make sure to stay in gear while hitting boost... what I mean is simply don't stomp on the throttle at 40, watch the car downshift and tear apart second and third gear... If you want to go boost, it is going to be expensive, but on an auto it tends to be far more expensive...
If this is your daily driver, I would suggest against it... If you can work on it in the garage over the winter or something though, and at least build your tranny. The motor can handle 8.5 psi without being worried of throwing a rod or something given you are tuned properly... Just need to be careful of our plastic transmissions that is all lol.
Have you looked into the cost of doing this? Just FYI without building the motor/tranny you're looking at 3,800 - 4,600 after all is said and done... You'll need to swap your tranny fluid, oil, get gauges, fuel management, mani, dp, piping, filters, wideband.... it goes on and on.
Just my 2 cents
