Cool...after I looked again, I realized that must be what it was for. I really wanted to put suicides on my roadster, but I thought the b pillar wouldn't take the stress. Great solution.
so got a lil something in the mail today, got my hubs, rotors, calipers and brake pads from Phatty Fabs. just waiting for the sencond box to arrive with the brackets and hardware so i can mount these thing up.