This is my 2004 Subaru WRX Wagon. I've only had it since May but I'm already working hard on modding it. I've added the following:

Exterior
Sedan Flared Front Fenders
STI Hood Scoop
STI Fog Light Covers with custom "SPT" Lettering
STI Bumper Splitters
STI Sideskirts
Custom SPT Hood Decals
JDM Side Visors
"You Got Beat By a Wagon" sticker on back windeshield
Tint 20% back doors and hatch
Gold Rota Formels with matching locking gold lugs and Dunlop SP Sport A2 size 215/45/17
Power Sunroof (cost me $700.00)
Subaru Bug Deflector

Interior
Viper Responder 791XV with optional Piezo Pain Sensor, External Battery, Tow Sensor, and Perimeter Sensor
10" Amplified RS10 Bazooka Tube
JDM S203 Hazard Button

Under The Hood/Peformance
Front Strut Bar
Whiteline Removable Rear Strut Bar
Grounding Kit
Cobb Tuning AccessPort Stage 2
GFB Stealth FX Blow-Off Valve
K+N Air Filter
Perrin Radiator Shroud
Optima Performance Battery
Bosal Brospeed Twin-Tip Catback Exhaust
STI Short Throw Shifter
KartBoy Front + Rear Shifter Bushings
Perrin Lightweight Pulley
Bosal Divorced Wastgeate DownPipe
Bosal 3rd Cat Eliminator
APS UpPipe
GP Moto Intercooler Hoses
Exedy Stage 1 Clutch with Lighweight Flywheel
SPT Intake with HeatSheild
STI radiator cap
SPT battery tie down
SPT oil cap