I have really been wanting to do long tube headers, a catted x-pipe, new exhaust, CAI and a new tune for my 05 GT and have been reading that all of that may not pass emissions. Well, I did a search on Google and found the following website that is specific to Georgia's emissions inspections.
http://www.cleanairforce.com/emission.htm#whattests8
It appears that they do not do a visual inspection for vehicles that are 1996 or newer.
I just thought this might be helpful for those members here from Georgia. I looked for this information on the forums and read a lot of stuff, but this seemed to answer the question of whether or not it would hurt you to have this stuff installed.
Now, I'm no professional, so don't blame me if you do it and fail, but common sense tells me that if they only do an SBD2 test and a gas cap test and everything tests fine, then there wouldn't be any way for them to know that the modifications are even there.
If anyone knows for sure what the answer is, I would greatly welcome it, but hopefully this helps with people that are possibly looking into these mods.
jsampsell