Whats up guys new to the forum. Going to purchase a 99a4 1.8t/auto. Need some advice on performance upgrades. So far from what I have read on this forum the GIAC is one best and should probably be one he first upgrades along with exhaust. What do you guys think

Thanks for the responce. Thought some one would reply w/ a little info but I can do some research and answer my ?.