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Any and all types of rotors have cracked, primarily under road racing conditions, be they drilled, slotted, dimpled, blank, cryo-treated, ceramic, guaged, pinched, tapped, swirled, scrapped, scrubbed, or scetched. Drilled rotors have been know to cracked more often than others followed by slotted.
Drilling and slotting off you absolutely no advantage for what you do, so why pay a premium for them?
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