Well, I thought I post some pics of comparison between Racing Brake, 99/RZ, and 93 stock brakes..
Here are some pics of the FRONT rotor comparison...
All Three (Left - RB rotor, Middle - 99/RZ, Right - stock US FD)
RB and 99/RZ - Thichness is about the same but RB is bit larger... as you could see
RB vs US FD - As you could see, RB is quite larger than stock.. And thicher..
