I have a 2006 Gt Auto (rather have a stick but this is what I've got) and I am planning on sticking with N/A. My plans are to put some inexpensive longtube headers, an offroad x-pipe, CAI, underdrive pulleys, and a tune. My question is how much power will these all together produce? Whats the best way to tune the car (mail order or a shop tune) if I'm just looking to make the car more fun to drive and not necessarily race it? Lastly, 3.73s or 4.10s Any advice/comments/answers would be awesome!