Quote:
Originally Posted by DerekSelmanRacing
Do not assume BMWCCA and SCCA allow Z4's in autocross...check with them unless someone on here knows. BMWCCA does not allow z4's for track days while NASA does. I don't know, but don't show up and be disappointed. By the way, I haven't rolled mine in 13 years of track and time trial events...I wouldn't worry about that for autox.
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Both groups allow Z4's in auto cross. SCCA allows any car that meets the height vs. track width threshold in their auto cross events regardless of whether it's a hard or soft top. BMW CCA doesn't allow ANY soft top cars for track days unfortunately. SCCA allows convertibles for PDX events so long as the owners manual states the car has roll over protection. The Z4 meets this requirement.