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      09-13-2008, 12:17 AM   #41
rzm3
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Drives: E92 M3
Join Date: Aug 2007
Location: USA

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again guys, without more information about the car, materials, etc., it's very hard to determine exactly how much performance advantage a CF roof has over a steel roof.

Performance gain? Definitely. But NOTICEABLE performance gain? Hardly. Marketing? More than you can imagine.