Here's PMNA's answer:
The PCCB brakes are suitable for race track usage, but you have to change
the pads to PAGID P50-RS14 (green). These pads are available from PMNA.
Please contact Phoebe in the parts department directly.
The estimated lifetime of the PCCB rotors is about 1500 miles. Please check
the rotors and pads periodically.
Since you don't plan to run the "12 hours of Sebring", you can change to the
RS 7:35 R&P and again can obtain almost every gear ratio to meet your needs.
Again, please contact Phoebe in the parts department directly.
Like I always state, tell your friends at PCA to contact PMNA directly with
ANY questions regarding "new" cars. We will try our best to help, because
we see this service also as an important part of Porsche. Unfortunately,
many people in PCA believe that PMNA only cares about the important racing
customers, but luckily this is absolutely not true.