The Stage 1 ICON 2011-UP Chevy / GMC 2500HD / 3500 6-8" Torsion Relocation Suspension System 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. 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 front with 2.0 Aluminum Series rear shocks, rear lift blocks w/ built in bump stops, torsion bar relocation brackets, all Made in the USA. ICON's Torsion Relocation System allows the factory torsion bar to remain in the factory location giving the center of the vehicle maximum ground clearance. Additional stages are available that include 2.5 series piggyback shocks front and rear and uniball upper control arms.