I just purchased an 05' GT . I had a built 88' 5.0 LX hatchback years ago, but it has been a long time for me with out a stang. The 05' has an AriRaid cold air intake already, but is stock beyond that (I think, bought it used from a dealer). I want to juice it up a little, but I don't want to supercharge it at this point. I have been reading up on performance upgrades and have a few ideas, but I thought it would be helpful to get the opinions of a few guys that have already been through this. Also - I might supercharge it in the future, so I do want my upgrades to be compatible with that if possible. Here are my ideas so far: I believe exhaust and a programmer will get me the most bang for my buck. I would like to go with some long tube headers, off-road X pipe and some less restrictive axle backs and mufflers. Not sure on brand or size at this point. I do need to pass emissions every two years, so I need a system where I can re-install factory cats to get that done. (FYI - I live in AZ, so we can actually un-install and re-install exhaust components without a problem - no rust). Then I would install a programmer set up for the exhaust and CAI. Please let me know if you think this is a good start to get some more HP and what kind of HP gain I would be looking at. Thanks for any help you may be able to provide!