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      02-19-2013, 11:00 PM   #4
CJ421
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Drives: 2017 F30 340i
Join Date: Feb 2011
Location: Philadelphia, PA

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The stock rotors work just fine as noted, no worries. Mine are still OK after 21 track days, 13 of which were with race pads!

You could get some OEM Z4 35is rotors, which are a direct fit replacement when yours need replacing (I'm planning on it). They're lighter and two-piece and only a bit more than the standard OEM rotors for our cars:
http://www.e90post.com/forums/showthread.php?t=433287

P.S. I observe novices don't brake hard enough, so if anything you'll be easier on your brakes now vs. later. Short + hard braking is the way to go, but it's something that's learned over time. Just listen to your instructor.
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2017 BMW 340i (F30) - M Sport, Mineral Gray/Coral Red, 6MT; Dinan exhaust
Past: 2011 335i (E92) - M Sport, Le Mans Blue/Black, 6MT