I ran across this picture of something I haven't seen before...

I tried to find where this hub/rotor (?) comes from but got nothing.

Anybody knows anything about this?

Click to view attachment

That looks like a stock 914 4 rotor redrilled for 5 lug. See the 3 empty bolt holes and then the 1 stud in the 6 oclock position? That is your 4 bolt pattern

I guess i was really looking for some exotic older conversion of some sort and didn't focus on the actual thing .
Of course they are...