Originally Posted by thejaredhuang
OP what rear rotor are you using?
I'm using Girodisc 2-piece STI sized rotors. They are dual drilled to work on 04-07 STI's.
Originally Posted by xilles
so if you get the oem backing plates. what rotor do you use? 04 sti? 06 wrx?
say you get 2004 sti rotors / 2004 sti e-brake shoes and 06 wrx backing plate... will this combo work?
Let me see if I can answer all of your questions:
If you have an 02-05 WRX you'll need either the adapter brackets or 06-07 WRX backing plates.
You would use an 04 STI sized rear rotor, as that is 5x100 and the correct rotor size.
06-07 wrx rotors are too small in thickness and diameter for STI Brembo calipers.
The STI ebrake shoe with NOT fit any year WRX backing plates (the hub/bearing is much larger), so no, that would not work.