The ICON 2011-2016 Chevy/GMC 2500HD/3500 6-8" Stage 1 Torsion Drop Suspension System was engineered to offer superior ride quality, performance, component protection, and reliability all in one complete package. With over a year of development and testing our suspension system is sure to perform with great on or off-road handling and drivability. System components and features include a heavy duty boxed sub-frame with integrated differential and transmission skid plates, precision CNC machined cast iron spindle knuckles, adjustable lift height, V.S. 2.5 Series front with 2.0 Aluminum Series rear shocks, rear lift blocks w/ built in bump stops, and tubular Delta Joint upper control arms. Additional stages are available that include 2.5 Series piggyback shocks front and rear, as well as the Torsion Relocation Bracket Kit (go to 6-8" Suspension Systems w/ Torsion Relocation System) that keeps the factory torsion bars mounted in the OEM location.
This system features upper control arms with ICON's patented Delta Joint. The Delta Joint is a heavy-duty high angle ball joint that combines the durability of a ball joint with the performance characteristics of a traditional uniball. While the industry standard uniball does a great job of allowing the control arms of a vehicle to articulate with little bind, they do have an inherent weakness that leaves more to be desired when used in a daily driven application - exposure to the elements. The Delta Joint features a zinc plated housing providing the first layer of corrosion resistance, while a tough grease seal keeps potentially harmful elements out of the inner workings of the joint. Metal on metal construction and a greaseable design increase the longevity of the Delta Joint while at the same time allowing for noise-free operation. What makes the Delta Joint unique is that it brings the best of both worlds to ICON upper control arms with features that make it more robust than a uniball, and at the same time capable of greater angularity than a typical ball joint.