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      11-27-2012, 06:59 PM   #9
techwhiz
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Drives: e90 335i Sedan - Arctic
Join Date: Feb 2012
Location: Bay Area, Ca

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Never drill rotors. Buy them with slots or cross drilled.
If they come from Brembo Zimmerman, they have drilled and stress relieved along with chamfered the holes.

If you have them drilled later, what happens if the hit one of the vanes?