Better alignment, improved caster, stronger than OEM, more travel. It also slightly relocates the ball joint after a lift to correct the suspension geometry. After a while the OEM balljoints with the stress of the lift and handling heavy 315 tires, will likely degrade overtime.What do the new UCA’s get you? Better alignment?
Necessary? Not technically right now...but 25% off black friday deal for high quality suspension components... sign me up. I love a good deal and hate paying retail for anything.