The ICON 2011-UP Chevy / GMC 2500HD / 3500 6"- 8" Suspension System - Torsion Drop - Stage 2 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 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 piggyback shocks front & rear, rear lift blocks w/ built in bump stops, all Made in the USA. The Stage 2 GM 2500HD / 3500 6-8" system upgrades the smooth body shocks to V.S. 2.5 Series piggyback reservoir shocks giving you superior overall performance & handling compared to any other available suspension. We do offer additional upgraded stages that include uniball upper control arms which will increase your suspension travel, or 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.