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I expect that one is custom as the rest of the car looks much the same. I think roll bars are more or less a joke for the most part in convertibles. In the even of a roll your windshield pillars and unless a roll bar is welded in and braced its probably going to rip off. Look at pictures of non convertibles that roll, the top of them gets absolutely crushed. I don't see a piece of tube steel preventing much. That said they do at least give some peace of mind i would think.