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Originally Posted by ZeGermanHam

I'm fairly certainly most of the aftermarket tubular upper control arms use revised geometry that provides a significantly different camber gain compared to stock uppers. UMI uppers provide around 5-6 degrees of negative camber gain, which you won't get with stock upper control arms. That results in radically improved handling.

Yep...I misunderstood the original comment at first (see above correction) ^^^

Thanks for clarifying.