Firstly make sure your wheels are big enough to fit the brakes under them (without a spacer). I don't think anyone here would recommend using a spacer on the track.

Secondly you'll need rotors (2002-2004 sti rotors for the front and 2008+ sti dual drilled rears which dba do).

You'll need to trim your dust shields as well.

Also, you'll need cash.

Good luck with the upgrade!

using the Perth-WRX mobile app