2014- Present Ram 2500 Series II adjustable rear control arms are constructed of 1026 DOM tubing and are completely TIG welded for superior strength and a top quality finish. These control arms utilize the proven Currie Johnny Joints. The Johnny joints offer better articulation than the factory rubber bushings and are made of high quality polyurethane for a much longer life and performance. Some competitors will use heim joints with misalignment spacers which works. However, heim joints won't absorb impacts or dampen harmonics from street use or stand up over time of daily use as well as on road environments which will wear them out over time. These are great for adjusting rear pinion angles and adjusting the wheelbase for stock height, lifted, and lowered trucks.