6 Inch Lift Kit | Diesel | Ford F-250/f-350 Super Duty 4wd (2008-2010)

Built for diesel Super Duty owners who want 6 inches of lift without sacrificing driveline geometry, this suspension kit raises your F-250/F-350 4WD while maintaining factory caster angles and steering control. The coil-spring design matches OE rates and pairs with properly-valved N3 shocks to deliver balanced on and off-road performance. You'll fit 35"–37" tires depending on your wheel offset and backspacing.

Installed and serviced at Road Runner Wheels & Tires. Most lift kits go in the same day. Call (678) 400-6467 to schedule.

What's included

• N3 Shock Kit — Application-valved absorbers engineered for balanced performance across on and off-road terrain.
• 6 Inch D-Coil — Heavy-duty coil springs matching OE rates and rated for diesel powertrains.
• Add-A-Leaf — Rear leaf spring upgrade to support the added weight and suspension articulation.
• 3 Inch Block and U-Bolt Kit — Rear suspension block for proper geometry and axle positioning.
• Radius Arm Drop Brackets — Maintain factory caster angles to preserve OE handling and driveability.
• Track Bar Relocation Bracket — Centers the axle and matches steering angles created by the drop pitman arm.
• Steering Stabilizer Relocation Bracket — Keeps proper steering control; a single RC stabilizer recommended with larger tires, dual unit required at 37".
• Kit Box — All fasteners and hardware needed for installation.

Important notes

• This kit is diesel-engine only. Does not fit gas-powered Super Duty models.
• Does not fit dually models.
• If your vehicle is equipped with rear overload leafs, they must be removed prior to installation.
• Tire fitment ranges from 35" to 37" depending on wheel offset and backspacing. A single stabilizer is recommended with larger tires; the dual stabilizer is required when running 37" tires.

Why customers pick this at Road Runner

• Radius arm drop brackets and track bar relocation preserve factory caster and steering geometry — no wandering or premature tire wear after install.
• Rough Country lifetime warranty backed locally by our technicians.
• Professionally installed by suspension specialists who complete these kits every week.
• Alignment performed in-house as part of every lift install — your truck leaves perfectly dialed in.
• OE-rate coil springs and valved N3 shocks deliver smooth ride both on highway and trail.

Ready to build it? Call (678) 400-6467. Hablamos Español.