Purchased a rear diffuser for M3 (F80). The fist one they shipped had separation / gap in the joining of the carbon fiber on the leading edge. I took pictures and sent them to RW Carbon and they paid for return shipping and sent me a new one. It was on my F80 for over 3 years and it looked new when I took it off and traded in for my F90. Great customer service and great pricing. No problem with the installation.
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