Rough Country - 26830-3.5-inch Suspension Lift Kit (Factory Cast Steel Control Arm Models) w/Premium N3 Shocks for Chevrolet: 07-13 Silverado 1500 2WD; GMC: 07-13 Sierra 1500 2WD FEATURES: Increased ground clearance; Levels front of the vehicle with the rear; No strut disassembly or strut compressor required for installation; Features application valved N2.0 series shocks which offer the best in balanced performance for on and off-road use; Fabricated blocks are stronger and offer a longer lifespan than cast blocks NOTES: Fits models with cast steel factory control arms only; Does not fit models with cast aluminum or stamped steel factory control arms; Does not fit AWD models; Does not fit 2007 "Classic" models; Does not fit GMC Denali models with Magnetic Ride Control; If truck is equipped with a mass damper on the front differential, the damper must be removed; Retain factory wheels with 0.25-inch wheel spacers (#1065) KIT CONTENTS: Front: Strut spacers and hardware; Rear: 1.5-inch lift blocks and u-bolts; Shocks: (2) Premium N3 Rear Shocks SPECS: Installation Time: 4-5 hours; Backspacing: 5.5-6-inches; Recommended Tire Size: 2857/75; Weight: 26.15-lbs; Superseded: 268.20 FITMENT: Chevrolet: 07-13 Silverado 1500 2WD; GMC: 07-13 Sierra 1500 2WD