About this list: The MOD refers to the modification. The Write up Explains the purpose for the upgrade and what it actually does, and the do I have it is pretty self explanatory. 

MODS

Powertrain
Custom Turbo Turbo FAQ
Turbo Parts Page Intercooler
Down Pipe Up Pipe
Custom 2.5" Turbo Back Exhaust Field SFC (no longer installed)
STI Motor Mounts Greddy E-Manage
Oil / Air Separator Rx7 Fuel Pump
Weapon R intake and Kartboy MAF Adapter 2.0L ej20G closed deck block with 2.2L n/a heads and 1.8 intake manifold and ECU. Click this link for build up. 
Phenolic Intake Spacers  
Suspension and Rolling Stock
KYB Struts/Eibach Springs Rear Sway Bar (not installed)
17" Team Loco 142 215/45/17 Ecsta Supra 712's 
Interior
Autometer Boost Gauge Custom Gauge Pod
Autometer Air/Fuel Gauge 4 Pt Seatbelt
JC Sports White Face Gauges CD Player and Decent Speakers
Exterior
Debadged the "SUBARU"

 

Tech Articles

Measuring Performance
Lowering Intake Temperature
Lowering Intake Temperatures Part 2
Fuel Injector Sizing for a 200 hp EJ18 using RS Injectors
Fuel Injector Sizing for a 2.5RS by Dabbler 
Loan Calculations and Top Speed Calculator
Compression vs Boost
Detonation
Fuel Pump Sizing
EJ18 Timing Belt Replacement
 

For more articles, be sure to check out the Unique Motorsports site.