ICONs tubular steel rear upper link arms are a significant upgrade over the factory units due to increases in strength, adjustability, and performance. These components are made from CNC machined and notched 1026 DOM steel and welded in - house, providing a major improvement over the construction of the stock units. This rear upper link arm kit features PTFE - lined FK rod ends for increased suspension articulation, reduced deflection, and link arm length adjustability and also utilize a multi durometer bushing that allows for noise free operation and maximum angularity without the need for periodic greasing andor other maintenance.The quality rod ends and bushings featured in these link arms allow the vehicles suspension to function as intended, without the bushing bind that limits the vehicle in stock form. After the design phase was completed ICON engineers put these parts through the ICON1K real - world test cycle for a final stamp of approval.