Radius Arm System 2003-2009 RAM 2500/3500s equipped with 6 inch Lift systems 2 piece crossmember Carli SuspensionTake your trucks performance to the next level with the Fabricated Radius Arm System. Designed around the Carli 6 inch Systems, this kit provides huge gains in articulation and control. Features and Benefits: Carli 6 lift radius arms were engineered for exact geometry. The result is maximum strength 3 16 construction with full length 1 4 internal gussets, zero bind axle articulation thanks to the axle control shock, and maximum wheel travel given