Rough Country - 479.20-4.5-inch Suspension Lift Kit w/Premium N3 Shocks for Ford: 05-07 F250 Super Duty 4WD, 05-07 F350 Super Duty 4WD FEATURES: 100% bolt-on installation; Increased ground clearance; Radius arm drop brackets allow for properly set caster; Proper caster is crucial to maintaining factory handling and driveability; Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem NOTES: Fits Diesel and V10 Gasoline engine models only; Gasoline engine models will require exhaust modification to clear the front drive shaft; Carrier bearing bracket is needed for models with 2-piece rear drive-shaft (#1197) KIT CONTENTS: Front: Lifted coil springs, track bar bracket, brake line brackets, bumpstop extensions, sway bar extensions, and radius arm drop brackets; Rear: 6-inch fabricated lift blocks and u-bolts; Shocks: (4) Premium N3 Shocks SPECS: Installation Time: 6-8 hours; Backspacing: 4.5-inches; Recommended Tire Size: 35-by-12.50; Weight: 149.23-lbs; Superseded: 479S FITMENT: Ford: 05-07 F250 Super Duty 4WD, 05-07 F350 Super Duty 4WD