When I did the rear control arms, I originally went with a fully Johnny Joint setup, and while awesome for rigidity and stability, they twist. The upper control arms have an air ride height sensor module on each side, and when things get out of alignment (twisting), an air ride CEL will be thrown, locking everything in place, including what it thinks is the actual ride height. Think left rear on ride height "Normal" and right rear in "Aero". This became hazardous. I sent them back for all poly joint versions, and all is well.
Those same ride height sensors are on the front upper control arms ( I think), so be sure you are calculating the right height arm sensor height when doing a 2" leveling kit to keep things happy--you may have to buy longer sensor arms from the aftermarket if they aren't adjustable.