I or one or the PR guys might have been where he got the Idea as we have been doing this mod to the Imprezas ever since the '00 Outback came out. Mind you that the regular 2000 (New style) Outbacks all have that rear breaks, not just the H-6.
This is a worthwhile mod as you will notice that the car breaks mor level instead of "nosediving" when you slam on the breakes.
I have been talking to Power Slot and they are almost ready to release (if they haven't already) this rotor.
Im waiting for it to order the full slotted set.
Good luck guys.
Leo