the group a rallycars do have often reinforced struts, (sometimes to accomodate total different kinds of suspension, or having extra metal sheets welded around/over it. ) in heavyduty use it could start to show cracks around the turret due metalfatique. Dough it wouldn't bother either. just in case, put in a strutbrace. Seen a sierra running down tracksdays for over 10years now, without reinforcements, just a strutbrace. And it doesn't show any cracks whatsoever.