E46Fanatics - View Single Post - I need ROTORS: Slotted vs. Drilled vs. OEM ?????
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Old 03-01-2007, 11:48 AM   #20
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Join Date: Aug 2005
Location: San Diego, CA
Posts: 3,005
My Ride: '99 323i
What exactly does "cast-perforated" mean?
Are the holes cast clear through entire, as a pilot, as a dimple, or something else?
What, if any, machining takes place on the holes after casting?
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