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      10-19-2013, 10:27 AM   #3
CJ421
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Drives: 2017 F30 340i
Join Date: Feb 2011
Location: Blue Bell PA

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The car is capable on the track without modification; prioritize getting high-temp brake fluid.
19" OEM are a little heavy, both weight-wise and economically; you could just about get a dedicated wheel/tire setup for the track considering the price of 19" PSS. A dedicated setup will pay for itself after a couple of events. You'll figure out pretty fast that no one cares if your wheels look cool on the track.

See this thread, lots of the same info you're probably looking for:
http://www.e90post.com/forums/showthread.php?t=878329
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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