The ICON 2011-UP Chevy / GMC 2500HD / 3500 6"- 8" Suspension System - Torsion Drop - Stage 3 System is our top level system that was engineered to offer superior ride quality, performance, component protection, increase suspension travel, and reliability all in one complete package. With over a year of development and testing our suspension system is sure to perform with the best on or off road handling and drivability. Included in this lift kit are components and features such as 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 shocks front & rear, rear lift blocks w/ built in bump stops, tubular uniball upper control arms, all Made in the USA. The Stage 3 GM 2500HD / 3500 6-8" system adds Tubular Uniball Upper Control arms which increase the front suspension travel, giving you superior overall performance & handling compared to any other available suspension. Uniball Upper control arms not only add suspension travel when paired with our V.S. 2.5 Series Piggyback shocks, but add strength and durability while improving alignment specifications. If you are interested in a high clearance torsion bar system we do offer the Torsion Relocation Bracket Kit (go to 6-8" Suspension Systems w/ Torsion Relocation System) that keeps the factory torsion bars mounted in the stock location.