6 Inch Lift Kit | Diesel | Radius Arm | C/o V2 | Ford F-250 Super Duty (11-14)

Built for diesel Super Duty owners who want 37-inch tires without sacrificing ride quality, this 6-inch radius arm coilover conversion suspension lift preserves factory suspension geometry while delivering the ground clearance and tire capacity you're after. The kit swaps your factory coil shocks for 2.5-inch Vertex monotube coilovers — nitrogen-charged, adjustable, and engineered to handle the weight and dynamics of a lifted diesel truck.

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

• Diesel Kit Box — foundational components tailored to your 2011–2014 Super Duty diesel platform.
• Block U-Bolt Kit (no overloads) — secures rear blocks to the axle with heavy-duty fasteners.
• 6" Coilover Conversion Kit Box — mounts, brackets, and adapter hardware for the new front coilover setup.
• Radius Arm Upgrade Boxes (qty. 2) — ultra-durable replacement arms at 27 lbs each, fitted with rubber bushings for vibration absorption and precision-engineered to maintain factory angles at the axle.
• Adjustable Vertex 2.5 Coilovers (front pair) — monotube design with external reservoir, 56% greater fluid capacity than average reservoir shocks, eight-stage adjustability, and nitrogen charge for consistent damping control.
• V2 Monotube Shock Pair — paired rear shocks tuned to work with the front coilover conversion and anti-axle-wrap rear blocks.

Important notes

• Diesel engine only — not compatible with gas-engine Super Duty models.
• 4WD models only — does not fit F-350 or dually configurations.
• Verify whether your rear leaf springs are equipped with a factory overload spring before purchase.
• Installation requires cutting and drilling; plan 6–10 hours for completion.
• Supports tire sizes up to 37 inches.

Why customers pick this at Road Runner

• Radius arm upgrade preserves factory suspension angles, keeping geometry dialed even after the lift.
• Adjustable caster-correction cam at the axle lets our technicians nail alignment on the same day as install.
• Coilover conversion replaces OE coils with 2.5-inch Vertex monotubes — 56% more damping capacity, eight-stage adjustability, and tuned for diesel weight.
• Fabricated steel blocks outlast cast alternatives and resist common lift-block issues like axle wrap.
• Rough Country's limited lifetime warranty covers structural and workmanship defects — backed by our in-house expertise.
• Professional alignment performed in-house as part of every lift install.

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