Rough Country - 521.20-3-inch Series II Suspension Lift Kit w/Premium N3 Shocks for Ford: 08-10 F250 Super Duty 4WD, 08-10 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 KIT CONTENTS: Front: Lifted coil springs, track bar bracket, and radius arm drop brackets; Rear: Lifted blocks and u-bolts; Shocks: (4) Premium N3 Shocks KIT CONTENTS: Front: Lifted coil springs, track bar bracket, and radius arm drop brackets; Rear: Lifted blocks and u-bolts; Shocks: (4) Premium N3 Shocks SPECS: Installation Time: 3-4 hours; Backspacing: Factory; Recommended Tire Size: 35-by-12.50; Weight: 132.24-lbs; Superseded: 521S FITMENT: Ford: 08-10 F250 Super Duty 4WD, 08-10 F350 Super Duty 4WD