Ceramic has a very good capacity for handling very high heats, so the extra heat from race pads shouldn't cause the ceramic to crack. Ceramic does fracture very easily when jarred, however, so my best guess would be that the instances where the ceramic has cracked would be due to vibrations or jarring.
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135i Coupe-Manual, Montego, Lemon, HG Black, sport, premium, CA, HiFi, Ipod/USB, heated seats
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