Update 2004:

The 2.0lt engine has been removed and a USDM 2.5 short motor has been fitted using all the 2.0lt bolt on parts, heads, manifolds etc.

The 2.5 has been fitted with forged CP pistons, I have also fitted a AVO440/450 HP turbo, along with an 02 STI TMIC. It is happy now to run 1.5bar with huge amounts of torque on tap, it is able to make 22psi at 3200 under full load, max torque is around 3800, max power around 6800. I am yet to get it on the dyno, but expect it to be 220-230kw ATW.__________________________________________________________

This is my STI Aust delivery V5, it was bought second hand in Sydney and is an Ex Subaru General Managers car. The first thing to have fitted was the 17" OZ wheels. The mods that I have done have been a long term project of testing and development.
For my exhaust, cold air and better cooling, my goal was to get the most form the STD turbo, IC and air box. I have fitted my own exhaust, cold air duct and a samco turbo inlet hose, tilted the std IC up, and made the scoop higher, along with an IC air splitter and water spray. This combination keeps the intake temps down. I run an EBC, to control boost to 19.5 psi peak, holding 18 psi to redline.
A unichip was fitted to sort the fuelling out, and I have worked on that to get the best tune for low speed spooling. The result is 182 kw ATW @ 5600rpm in 4th gear (std STI is 116kw) with neck snapping torque. 0-100kph is 4.2 seconds and 1/4 mile 12.2 seconds.