Impreza-GT

Hi everybody!First i am very sorry for my bad english!
I am a proud owner of Impreza GTTurbo for about a year.
It has no serius mods, a K&N kit and STI complete exhaust system
(about 240+ hp with that).And racing springs for better handling.
Now i am planing to do some serius mods and i need some advice.
I done some research on internet and some consultation with my subaru
mechanic and i come up with two plans:
1.

New turbo(i heard that Garrett turbos are very good),
front mounted intercooler,new fuel pump,new injectors(i dont know which ones
are moast appropriate),complete SuperSprint exhaust system for 2.5L models,no catalyst(And i am assuming that with new turbo and other mods it is better 2.5L than a 2.0L exhaus? ) and an ECU remap and K&N kit that i alredy have.
That will give about 360-400 hp i assum?
Only problem i have is that i dont know where to send my ECU for remap because i live in Serbia(Belgrade)???

2.

To do twin turbo conversion by changing manifold and add new turbo

A front mounted intercooler for twin turbo witch i dont know where to find
and other mods that i alredy already mentioned before.............

I mostly like the second
But how hard is to do twin turbo ECU remap and where?
Will this give mor hp or not, or beter boost and acceleration or top speed

I will be very happy if some one will have some good advice for me

Here are two photos of my Impreza and engine

Impreza-GT

Is there any chance that somebody can give me some advice???

Slowboy Racing

Hi

Garrett is good yes, but you don’t need two there is no point. And you also need to have the ecu in the car when you have it mapped so it will mean getting a mapper to come to you or a long drive.

Assuming you have a 2.5 block you will need to look at the following.
Injectors
Headers
Intercooler
Turbo
Induction

That is the starting block for your goals; I would also consider the apexi ecu.