Let me rephrase, do the RFTs keep their structural integrity? Do they not "blowout"?

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2008 X5 4.8 | Space Gray | Black Nappa | Dark Burl | Premium | Sport | Tech | Cold Weather | Comfort Seats | Comfort Access | 3rd Row | iPod | 20" Y | Auto Tailgate | Rear Climate

Fun with the X5: http://youtube.com/watch?v=vC33J-zMR78 and http://youtube.com/watch?v=_P_pu5TVW-4