I just picked up my brake rotors after having them machined and found these bad boys on the front counter.
They have 12 piston calipers and the rotor absolutely dwarfed my 355 mm diameter FPV rotors. Apparently they are a custom build for a Hummer and will not fit under any wheel under 22" diameter. That brake pad looks like it covers about 40% of the rotor, you would have to be a maniac to cook these. I would hate to see the cost of them though.
I want a set for the Mini!