I have wanted to go to a track for a number of years now but understood that some safety rules required that the drivers helmeted head had to be 2 inches below a roll bar. So in a Miata I would have had to have a roll bar installed and I think I've read that the Brey-Krause extension is a roll bar extension dealy to comply with this rule on a boxster.. am I correct?? Is this a pretty universal rule? scca inspired maybe?
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