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The issue with most suspension kits is the stock upper ball joints are being maxed out prior to the suspension fully drooping the ball joints are just not designed for the extra strain when the suspension is loaded leading to premature ball joint failure.The Zone heavy duty upper control arms are engineered to correct this issue by re-positioning the ball joint to allow a full range of motion when used with suspension lift kits. These HD arms dwarf the factory units and are built from 1/8steel boxed and fully welded with CNC-machined bushing and ball joint cups. The Zone arms feature a durable textured black finish and come fully assembled right out of the box with OE durometer rubber bushings for quiet reliable function. OE-style heavy duty greasable ball joints are utilized for a long service free operation and superior corrosion resistance to uni-ball style control arms.The Zone HD upper control arms are the direct factory replacement for the 2006-2014 Dodge Ram 1500 4WD trucks.