If you're looking for a serious lift for your truck, but want it to still be able to be a daily driver, you've found the right kit. You'll also be able to run much larger tires and wheels (see wheel size tab for more info on commonly used wheel and tire sizes. The STL (stock torsion location) 6-8" kit (you will need to add torsion keys part CSK-C13-3 to go from the fixed 6" up to 8" in the front) is designed for maximum ground clearance and leaves the torsion bar in the stock location. one-piece gusseted sub-frame with a steel full size differential skid plate, fabricated steel, CNC machined front steering knuckles, high strength steering drop center-link with heim jointed support links to minimize wear of the factory idler and pitman arms, differential drop brackets, heavy duty bump stop brackets, extended sway bar end links, brake line drop brackets, all of the necessary install hardware, and O.E. front shock extensions. This kit also includes CST's hand built S.T.L. front brackets, allowing you to keep the torsion x-member in the stock location! Steering stabilizer brackets are built into the kit and CST's stabilizer shock kit CSR-2946 can be purchased as an option. To lift the rear of the truck, this CST Lift Kit includes fabricated 4" lift blocks with bump stop pads and heavy duty 3/4" u-bolts. Extended length rear shocks are required and are available at an additional charge (above), or you can use another brand of your choosing. No cutting of the front differential is required or welding of any kind. CST's 6-8" lift kit has zero compatibility issues with the GM Stabilitrak system. The part number for this item is CSK-C3-17-1 and it fits 2011-2016 Chevy Silverado, GMC Sierra (2500HD 3500HD Models). Alternate part numbers: CSK-C3-17-1 css-c3-17 csk-c3-17