^^ so you can't use the xs Turbo with an '03 or '04 then? that Turbo comes with the pfc.
you would be correct.
staffords Turbo set up is off a piggy back and he has on on a 03 gts as we speak.
xs's kit wont work on 03 +
power fc just doesn't have the right connections (or software) to work with dbw.
to answer your question you would need
new throttle body, throttle cable, new wiring harness, new pedal assembly, and all other related bolts & accessories.
like lucky said too much money for the pfc your better off going Turbo.