I brought my 1998 Subaru WRX STi version 4 (GC8) in April 2006 bog standard and this is what i have done to it to date. (June2008)

Engine
3" Downpipe of Turbo
HDi Front Mount Intercooler (600x300x94)
HDi 2.5" Polished Aloy Piping
HKS Super Sequential BOV
Trust Airinx Mushroom Air Filter
2.5" Mandrel Bent Exhaust Piping
5" RPS Muffler

Exterior
Chargespeed Front Bumper
C-West Side Skirts
C-West Rear Caps
Clear Front Bumper Indicators
Clear Side Indicators
1 Piece Smoke Black Angel Eye Projectors
Smoke Black Clear Tail Lights
K-Sport Fully Adjustable Suspension
NFUSED Personalised Plate
Ganador Aero Mirrors
Carbon Bonnet
Autoloc Shaved Door Kit

Interior
Greddy Double Gauge Pilar Mount
Motor Meter Boost Gauge
Motor Meter Oil Pressure Gauge
Trust Turbo Timer
Mongoose M60G 5Star Alarm

Sounds
Sony CDX-F7710 MP3 Headunit
Rockford P163C Rear Speakers
Rockford Front Speakers
2x Rockford P2 Subs
Rockford 3001 Amp
Rockford 5001 Amp

Rolling Stock
17x8 DTM Alonso's
Dunlop Direzza DZ101 215/40/R17