adey

IIRC R33:
GTS: 296mm
GTT/GTS-T: 310mm
GTR: 324mm (black brembo)

350Z: 324mm (gold brembo)

Note: R33 had 12mm caliper bolts, while the 350Z has 14mm caliper bolts. I'm guessing that rotors would be interchangeable, but don't quote me on that.

I want to say the early 350Z single pot non-brembos were 310mm but unlikely that if it will work with the R33 GTT/GTS-T calipers. (R33 GTT had 4 pistons, the 350z is a single piston.)