Porsche 993 rear brake question...

[gerard]

Here's a quick question about the rear brakes of a Porsche 993: what
size and thickness are the rotors?

I'm looking at a set of rear 993 4-piston calipers and I heard this will
do nicely as a brake upgrade for the type-44 front brakes (like you do
using the bira.org stuff and super-expensive Big Reds). Just wanted to
check the thickness of the rotor they can take.

And, while I'm at it, how does the Porsche 911 turbo emergency brake
mechanism work? I know they're drum units under the brake disc/rotor
because the rear 4-piston brembos don't do no handbrake stuff. Any
4-piston or 2-piston rear calipers out there able to do emergency brake
stuff?

G.