I have a 2003 bugeye trust me a standard wrx is nothing special at all. They are slow and need quite abit of money spent on the to get them going.
TMIC $1000
Exhaust $1000
Injectors $800
TD05 16g turbo $1400
Initial tune on stock ecu $1000
might need a fuel pump $500
+ labour
+ 2 - 3 hours on the dyno $500 - $750
+My brand new turbo is fault so add extra costs to get that replaced.
Expecting 280hp at all 4's running around 1.4bar of boost.
With this new power i will probably need a new clutch soon.
hopefully gearbox will last as im capping it at 280hp so i dont need to buy a replacement
if you have your heats set on a wrx go buy an old sti money would be better spent there