C5 rotors and pads are the exact same size as Z06. But, stock Z06 pads are made out of a different material. Other than that they are the same.
I use the NAPA $25 C5/Z06 rotors on the track. They are disposable...
I use Carbotech race pads for the track. They are carried by forum vendor pfyc.com.
They make a full line of pads. Usage goes something like this:
XP8 front, Pather Plus rear (beginner on street tires)
XP9 front, XP8 rear (more advanced driver on high performance tires)
XP10 front, XP9 rear (experienced driver on R compound tires)
XP11 front, XP10 rear (newest full race setup - which is what I used at my last two races)
I've used all of the above combos but the first. They are all good.
