Improved Ground Clearance and Ride Quality. Take your workhorse to the next level with Rough Country's 3.5" Suspension Lift kit for dually models. Rough Country's 3.5" Suspension Lift kit provides an improved ground clearance and is designed for on or off-road driving. Take your truck to new heights with this excellent option for GM HD Models.\ Innovative Design and Construction. This kit features a set of high-quality, tubular Upper Control Arms with durable rubber bushings. These arms are designed to promote a factory-like geometry by keeping the ball joint at optimum angles after lifting. This design allows for an improved, full range of motion from the ball joint, with less stress, wear and tear. This kit also features a set of durable, forged torsion bar keys, offering uncompromising strength and rigidity over factory keys. A set of front and rear N3 nitrogen-charged shocks are also included in the kit, giving your truck incredible ride-quality both on and off-road. Once installed, this kit gives your truck plenty of ride height for up to larger tires while offering a clean, level look from front to rear.\ Installation.aFeaturing a 100% bolt-on installation process, an estimated timeframe of 4-6 hours is predicted to complete the install. This full kit can be installed at home using standard tools and can be completed efficiently and quickly!\ Lifetime Replacement Warranty. Rough Country's 3.5" Suspension Lift Kit is backed with a lifetime replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!a.