There brembo rotors available as you describe...it's the bmw perf rotors. Now if you're asking about floating 2 piece rotors, that's a different story. There's a side of brembo that makes oem stuff (like our calipers and braking setup) and then there's the brembo race/perf side. Essentially they're under one hat, but act as two separate companies. Thats what I was told by the US importer of brembo race products at least.
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