I have a friend that makes them and I ended up having an extra. Its a little box about 3x2x1 that has the subaru o2 pigtail comming out. So you just put your wideband/bolt where the old o2 was and plug the pigtail into the old harness and ziptie the box to the trans support. I've put on about 500 miles catless with no cel
I measured the output once, between the old o2 heater terminals is a big resistor I'm gesssing (hence the reason the box gets warm) and the o2 terminal outputs a fluctuating .1 to .9 volts. Let me see if I can dig it out, pm me if you want it.