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Rear rotors are hard to engineer for 2 piece floaties. The e-Brake drum causes havoc to the mounting surface from the hub to the rotor ring...There's just no space to put that additional floating hardware AND accommodate a drum for e-Brake. I've NEVER seen a rear 2 piece design that doesn't involve new caliper or modified pad (PFC DirectDrive for E46 M3 comes to mind, so does RacingBrake rotors).
I suspect it's highly unlikely that engineering problem has been solved, otherwise SOMEONE would have come out with it. And few vendor (read: NONE) will take on the liability risk to make one that removes the drum brake hardware, IMO.
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Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
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