I was considering looking for a wrecked STI (preferably 04-05 for my 04wrx) and swapping the brakes over. Would they fit directly? or would i need to make some modifications? Im running 17" wheels in the summer but i use the stockers for the snow.

 

You can bolt Brembos directly to your WRX as long as you use '04 STi rotors (or aftermarket compatible). They are not ideal for performance as they have far too much front bias with stock WRX rears, but they will function properly.