Rough Country - 27920-6-inch Non-Torsion Drop Suspension Lift System w/Premium N2.0 Shocks for Chevrolet: 02-06 Avalanche 1500 4WD, 00-06 Suburban 1500 4WD; GMC: 00-06 Yukon XL 1500 4WD FEATURES: Maintains factory ride quality; Will work with Auto Trac; Unmatched ground clearance; Torsion bars stay in factory location; Newly Redesigned; Easier Installation; Axles maintain factory position and angle; No drivetrain or exhaust modifications required; Designed to reuse factory compression travel stop; Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem NOTES: Does not fit HD models; Frame bracket modification required; Models equipped with factory painted bumpers will require trmming to valance and bumper; If equipped with factory 17-inch wheels, 17-inch or larger aftermarket wheels must be used; Torsion bar unloading tool required for installation (#1067) KIT CONTENTS: Front: Lifted knuckles, differential drop brackets, front and rear drop crossmembers, skid plate, sway bar links, CV spacers, and non torsion bar drop brackets; Rear: Lifted coil springs; Shocks: (2) Premium N3 Front Shocks SPECS: Installation Time: 8-10 hours; Backspacing: 4.5-inches; Recommended Tire Size: 35-by-12.50; Weight: 246.15-lbs; Superseded: 279N2, 279S FITMENT: Chevrolet: 02-06 Avalanche 1500 4WD, 00-06 Suburban 1500 4WD; GMC: 00-06 Yukon XL 1500 4WD