I had their two piece rotors, pads, lines, and regular rears on my TSX before the BRZ. It was a FANTASTIC upgrade...and still going strong after 5 years too.
Their two piece design is really cool and they have kits for us (probably the same ones they used for the WRX):
http://www.racingbrake.com/Upgraded-...R-p/2042-k.htm
They also have a two-piece rear kit that retains the parking brake (this looks unique for the 86 platform):
https://www.racingbrake.com/ProductD...ductCode=2315K
I am thinking about going with RacingBrake again for the BRZ and, like you, am wondering if anyone has this on their 86.