Ok, but a TD05, or VF22, some good yellow injectors and an STI ECU ain't exactly cheap. And, even then, it's not up to STI spec.
Then, there's the fitting, getting it to actually work properly...
After you sell yours, it might take another $3-4000 to get the sti?
Mods, and getting someone to do it, and getting it all working properly will probably set you back $1500-2000
$2000 more and it's a FULL STI...
Just pointing out the options...
Trust me, once you've shelled out money and realise how far it still has to go to be an STI, you'll wish you'd have saved and got one...
Just my opinion...