Description ProComp offers a heavy-duty adjustable leveling kit for the all-new Chevy Silverado and GMC Sierra 2500HD & 3500HD 4WD trucks. This kit provides a new leveling solution that is specifically designed to function and install properly on GM's new suspension design. It features industry-leading forged torsion keys with specific indexing designed for each application, allowing for a 2.5 inch lift. This system maintains the factory ride and handling while providing clearance for up to a 35x12.50 tire (note: does not work with AT4X or ZR2 models). Features Heavy-duty adjustable leveling kit with specific indexing designed for each application Features industry-leading forged torsion keys Allows for 20x9 +18 or 0 offset with 35x12.50 tire (trimming may be required with some tire styles on 0 offset) Maintains the factory ride and handling