how to start out
There's a few other posts on this page asking the same question, just go down/up a few posts and you'll find them. The advice will be the same for an '04 or '05 model. '03s were a little less in the HP department and didn't have a LSD.
It depends on what direction you want to take it. The best way is to start off with a few items that correct the factory short commings, get an oil catch can (OCC) and MSD plug wires. The OCC will keep the oil blowing past the PCV out of the intake, throttle body and intercooler and the MSD wires will eliminate the chance of fried wires from the turbo heat as well as producing several hundred times stronger spark to the plugs.



