These are 380 mm discs. They are 2 parts like the original. Just the mounting kit is inside/ behind. You can’t see it. Zimmermann is a well known brand for breaking equipment. Cost half than Porsche asked me. Easy to install .

 

If somebody is interested

 

Yea, if they're Zimmerman, you're good.

 

What is the torque required for those nuts? I just checked mine and while they look fine I wonder if they are a bit loose.

 

This is the sort of fastener that you really have to have full manufacturer information about the bolts. There CAN be bolts that are tightened to a specific torque that changes the interface between the bolt and the mating part... in some cases, the threads distort under torque to jam the bolt in the hole to prevent loosening over time (cheaper and faster than thread locker during assembly). Those types of bolt are designed to be used once in assembly and never again be loosened or tightened without replacing them. If that is the case for these brake bolts, checking or tightening the bolt torque could cause damage to the bolts requiring all of them to be replaced. Since loosening those bolts while driving could be catastrophic, it is fairly certain that the documented assembly procedure and the materials and torque specification can be very specific for this use. These (maybe) aren't like lug nuts/bolts that you can use and reuse many times without issues. So the torque spec alone isn't enough info to know whether loosening and re-torque-ing the bolts is a good or bad idea if you aren't replacing all the bolts.

 

This.

I have 2-piece rotors on my 928, my wife's 997, and on my pickup truck. I recently replaced the fronts on both the 997 and the pickup and the new rotor rings that mount to the aluminum hats came with new fasteners, and the instructions were very specific with bold red warnings that those are single use fasteners and must be discarded after disassembly and the new ones that were included, installed.