I used a oem non-abs prop valve, that is all you need parts wise then you just make up the brake pipes! Doesn't need to be an EK9 prop, just an ek civic one which came off a car with rear discs, 40/40 type
This pic says it all really, you can reuse the old rear brake pipes, no need to change these
I think most if not all ek4's will have abs
I used a non abs prop valve from a 96spec (non abs) Teg or from an EG civic esi
The only other issue encountered was the fixings to the master cylinder for one of the brake lines needed to be changed