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Roll Bar: All cars running 11.49 or quicker must be equipped with a roll bar conforming to NHRA general regulations.

Roll Cage: All cars running 10.99 or quicker must be equipped with a roll cage conforming to NHRA general regulations*

*By NHRA rules, a roll cage is not required in a full bodied car until 9.99 or 135MPH. A roll cage is required between 10.99 and 10.00 only at speeds of 135 or higher.

Always lots of debate on this subject but for me a roll bar or cage equals wearing a helmet and harness. Not something I want to do on the street. Your head can travel a long distance during an impact, and hitting a metal bar (even padded with foam) without a helmet would hurt. Even a thick head like mine.

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great info DG!!