just bought a 2001 eclipse gt and I want to start upgrading, any tips on what works and what doesn't?

 

Hey welcome to the forums!.. dont know much about GT.. i forget if they turbo :-( i think they are not 100% sure.. oh go thats bad... get an exhaust they always help :-p

 

Welcome to the forum. There are plenty of upgrades that you can do. The most immediately helpful ones are performance tires, at least in my opinion. They increase handling and acceleration a noticeable amount. After that there are plenty more things for you to work on.