I've been around these forums for a good while and it seems that most people come in expecting to gain massive amounts of torque and horse power with bolt ons. Unless your spraying, your not gonna get massive gobs of powers for under 5,000-15,000. My advice is to go ahead and go with exhaust set ups and any other mod that wont comprimise your goals for TT later, should you choose to do so. If it's noise your looking for, go ahead and install the intake mods, but dont expect to feel a whole new ride. Weight reduction mods seem to be better for your money in my opinion, because they arent gonna screw up ur engine, light weight rims/brakes can look better and help with handling.

So thats my bit of advice, from one experienced newb to another.