I just bougth a 2002 gt And this thing is totally stock besides the flowemasters i just put on it. It didn't have a lot of power either and it kept getting worse so i took it back to the dealer and they replaced the cats, big difference. So now i want to give it more power and a loud throaty sound. My plans are side exhaust, but i don't know if i can use an x pipe with it and want to put headers on it. I don't know i thats a good way to do things or not. Ill prolly paint black racing stripes on it as well and maybe lower it. Does the bigger throttle body help at all? Cause i was going to get one of them, underdrive pullys, cold air intake and a programmer. Anything else i can get thats not the costly and will all these work together or will i have to change things around. Thanks for listening and i hope u can help.