I was wondering what performace mods are out there without voiding the warrenty. (I have $6000 to spend) For an Automatic tC

 

Well let's start with the warranty stuff...

There is nothing in existance that will instantly "void" your warranty. Here's what happens... if something goes wrong and you take your car in for "warranty" repairs... they can deny the warranty claim IF they can prove that a non-OEM part directly contributed to the problem.

The rest of your warranty is still active and nothing is "void." It's just that if something aftermarket causes a problem with your car, and the dealership can prove it, the repairs are not covered by your warranty - meaning, you have to pay for the repairs.

As for parts... you can get pretty much whatever you want. If you have that much to spend, you might as well turbo it and put a full exhaust on it. Up to you...