This is what I have on the car now...not much but a good start considering it came with the car and I paid $2000 for it...
A list of the current "mods":
16g Big Turbo
2g Throttle-boby
EVO III Exhaust manifold
Full 2.75" Exhaust (Downpipe through to exhaust)
K&N on stock snorkle and 1g MAF
Buschur Intercooler to throttle pipe
Manual Boost Controller
A/F Gauge & Boost on the pillar
ACT 2600 Clutch set