RB Center-Mount 2 piece Rotor Advantage Over Conventional Surface Mount.
1. RB two piece rotor runs cooler than competitions
Convergent vane design:
2. RB uses less components:
RB Center Mount design provides widely open & Un-restricted "Air Ports" from both Inboard and outboard while other brake companies try to achieve the same by "directional hats". Without regarding how effective it is, they need 4 components (2 hats, 2 discs) for a pair of rotor vs. RB's 2 components (1 hat, 1 disc-unidirectional)
Stoptech - Requires 4 different components (2 hats, 2 discs) for a set of directional rotor vs. others' 3 components (1 hat, 2 discs), vs. RB center-mount design (1 hat, 1 disc)
3. RB center mount design saves installation space and allow using a deeper pad w/o interfering with the hardware.
4. RB self-locking design w/o using loctite so to retain torque consistent at any braking temperature:
Illustration of disc movement (sliding) during heat expansion & contraction:
4. Rotor Treatments:
Disc is heat-treated before machining to minimize the rotor from warping during the extreme heat cycles.
Rotor surfaces are treated by EDP with Black Paint, so all the internal vanes, corners, crevices are penetrated with a uniform coat, unlike plating which can only reach the external surfaces.
With only a few stops the black paint where the pads in contact, will disappear and show in metallic finish while the rest surface / area remain protected from corrosion, so the rotor will have a nice look for the rest of life w/o undesirable rusty area like OE or others.
After a few stops:
See the complete review here (Corvette ZR1 CCB to iron rotor conversion)