I just got an S4 for christmas (Black 2002 w/ Sport Package) and im going to send my car to AWE to get some work done. I can spend 5k and I dont know if I should get full exhaust w/ intake, chip (GIAC X), and turbo gauge or skip the downpipes and get suspension. I figure the downpipes b/c the rest of the exhaust is useless because of the stock cats but i dunno. Also, does the exhause void the warranty??? The chip can be hidden with the stock chip module but i dont know about the exhaust.