Scargo,
The oem Subaru has a non adjustable dual proportional valve in the back wheels.
You just need to put 2 adjustable Prop-valves in the front wheels and remove the oem unit from the back wheels.
If you are upgrading the rear brakes. You may not want the valves in the front.
I am running no proportional valves righty now with my double size rear calipers. I like it.
Bob
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