Rough Country - 236.20-6-inch Suspension Lift Kit w/Premium N3 Shocks for Chevrolet: 07-13 Silverado 1500 4WD; GMC: 07-13 Sierra 1500 4WD FEATURES: Provides level stance; High clearance crossmember gives unmatched ground clearance; Requires no modification to differential mounts, drivetrain, or exhaust; 100% precision laser cut materials; No need to disassemble struts; Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem; Includes application valved N3 series shocks which offer the best in balanced performance for on and off-road use NOTES: Requires minor cutting and drilling; Does not fit 2007 "Classic" models; Does not fit models with electric steering; Does not fit AWD models; 18-inch or larger wheels are required; Please view installation instructions for complete information on proper tire/wheel combinations KIT CONTENTS: Front: Lifted knuckles, front and rear crossmembers, upper strut spacers, brake line brackets, CV spacers, differential drop brackets and skid plate, sway bar drop brackets, and hardware; Rear: 5.25-inch fabricated lift blocks, u-bolts, and hardware; Shocks: (2) Premium N3 Rear Shocks SPECS: Installation Time: 8-10 hours; Recommended Tire Size: 295/60 R20; Weight: 193.28-lbs FITMENT: Chevrolet: 07-13 Silverado 1500 4WD; GMC: 07-13 Sierra 1500 4WD