I've noticed that Cusco tower braces have a single bolt connecting the bar to each tower at a pivot. In the BMW community these kinds of braces are viewed as mostly cosmetic as, should there be deflection of the shock towers relative to each other, the brace would only create a parrallelogram with its own points of flex at the pivots rather than a true box that would be formed if the pivot points had been bolted at two points to create a pivot or better if everything was completely welded.
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