Hi carbon are more resistant to wear from semi met pads and are usually found on performance euro cars. Hi carbon and semi mets are the highest performing combo. Warping? Cryo treated rotors supposedly help with that. Centric used to sell hi carbon cryo treated rotors, but don't know if they still doIs it worth spending additional $15 for the high carbon Advics rotors? It is supposed to help against warping.
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