These things will probably make the car quicker - but if you were interested in performance why did you by an automatic to start with? Personally, I don't think it would be worth it, it lowers the value of the car if you want to sell it in a couple of years since the average buyer doesn't want that stuff. Better to get a nice set of custom wheels to give it a sportier look and leave it at that. Whatever you do, your car is still under warranty, make sure you don't do anything that voids it.