6 Inch Lift Kit | Diesel | Radius Arm | C/o Vertex | Ford F-250/f-350 Super Duty (08-10)

Built for Ford Super Duty diesel owners who want 6 inches of lift without sacrificing ride quality, this Rough Country radius arm coilover conversion kit transforms your truck's suspension geometry while preserving factory angles. Run up to 37-inch tires and experience the smooth, controlled ride of upgraded 2.5-inch Vertex Coilovers paired with precision-engineered radius arms.

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

• Kit Box (08-10 Ford Super Duty) — The complete structural foundation for your 6-inch lift, engineered to factory specifications.
• Coilover Conversion Box — Top-mounted reservoir brackets and mounts fabricated from 1/4-inch steel to support the new coilover setup.
• Heavy-duty radius arms (qty 2) — Weighing 27 lbs each, these ultra-durable arms feature rubber bushings for vibration absorption and bolt directly into factory mounts while maintaining factory suspension angles.
• Adjustable alignment cam — Allows caster correction at the axle for precise geometry tuning after installation.
• Vertex 2.5-inch adjustable coilovers (front, qty 2) — Nitrogen-charged, 8-stage adjustable shocks with monotube design and external reservoir; 56% greater fluid capacity than standard reservoir shocks for superior damping control.
• Vertex 2.5-inch coilovers (rear, qty 2) — Matching rear shocks for balanced ride and handling across all 6 inches of lift.
• Add-A-Leaf (rear) — Reinforces rear leaf-spring capacity for load support and stability.
• 3-inch fabricated blocks with U-bolts — Constructed from stronger material than cast blocks for longer lifespan and durability.

Important notes

• Does not fit dually models.
• Factory rear contact overload springs must be removed during installation.
• Gas models may require exhaust modification to clear the front driveshaft.
• Installation requires cutting and drilling; 6–10 hours recommended to complete.

Why customers pick this at Road Runner

• Geometry correction built in — radius arms and adjustable caster cam preserve factory suspension angles, so your truck handles like stock despite the 6-inch gain.
• Professional installation with in-house alignment — every lift install includes wheel alignment performed by our technicians to ensure proper geometry and tire wear.
• Lifetime warranty backed locally — Rough Country's limited lifetime replacement warranty against manufacturer defects is honored right here at our shop.
• Vertex Coilovers tuned for your truck — 8-stage adjustability and 56% greater fluid capacity deliver a smoother, more controlled ride than standard shock upgrades.
• One-stop diesel expertise — our team installs these kits weekly and knows every cutting point, drilling location, and potential clearance issue for 08–10 Super Duty diesels.

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