Purpose of new upper control arms?

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Z mann R2

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Been seeing many of you get new Zone UCA's along with your bilstein installs. What benefits over stock do they offer?
 

CunningStunt

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There are some users who had the upper control arm ball joint going bad if you raise the bil's higher than 2.1, so most people go ahead and buy zone, mevo, or moog UCA's while putting new shocks in
 

quietpeen

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in either late model 2012's or 2013's they changed the upper control arm design and its not as robust. When leveling it can put more stress on the ball joint causing it to pop out.

since you have a 2009 you really don't have to worry as its not common with the older design.
 

JB1

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The Zone UCA also corrects the BJ angle and it’s little longer
 
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