Disappointed to report that my "updated" plates had a bolt break after three track sessions today. However, in my case it sheared about one inch from the top
Guess I'll be in touch with GC on Monday...
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'11 E90, Cantrell brake ducts, Apex 18x10 ARC-8, 265/35 PSS, RS19 pads, -2.2 camber, CMS Lap Timer Pro