6 Inch Lift Kit | Diesel | Radius Arm | M1 | Ford F-250 Super Duty 4wd (11-14)

Built for diesel F-250 Super Duty owners who want 6 inches of lift without sacrificing ride quality or factory geometry — this radius arm lift kit pairs durable fabricated blocks with heavy-duty arms and M1 monotube shocks for balanced on and off-road performance. You'll clear 35"–37" tires while maintaining factory suspension angles thanks to precision-fit radius arms and adjustable caster correction at the axle.

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

• 6-inch D-Coil springs — fabricated, stronger than cast alternatives, with a longer lifespan and specially designed anti-axle wrap geometry to maintain stock ride quality.
• Heavy-duty radius arms (pair) — precision-fit to factory mounts at 27 lbs each, featuring durable rubber bushings for maximum vibration absorption and factory-angle preservation.
• Adjustable alignment cam — bolts to the axle and allows caster adjustment to dial in geometry after install.
• Fabricated rear blocks with U-bolt kit — stronger than cast blocks; specially designed anti-axle wrap construction eliminates common lift block issues while maintaining stock ride quality.
• M1 monotube shock absorbers (pair) — application-valved for balanced performance on and off-road, engineered for daily-driver comfort.
• Track bar relocation bracket and drop pitman arm — repositions steering linkage to maintain factory angles and driveline geometry.
• Brake line relocation brackets — protect hydraulic lines during suspension articulation.

Important notes

• Fits 2011–2014 Ford F-250 Super Duty 4WD diesel only — does NOT fit F-350 models, dually models, gas engine models, or vehicles equipped with rear factory contact overload springs.
• Recommended tire size 35"–37" — verify your wheel offset and backspacing with our team to ensure proper clearance.
• 100% bolt-on installation — no cutting, drilling, or welding required.

Why customers pick this at Road Runner

• Precision-fit radius arms and adjustable caster cam preserve factory suspension geometry — no compromise on ride quality or driveline angles.
• Rough Country lifetime replacement warranty backed by local service and support.
• Professional alignment performed in-house after every lift install — corrects geometry and ensures tire wear is even.
• Fabricated blocks outlast cast alternatives and come with anti-axle wrap technology that kills common lift-block problems.
• M1 monotube shocks tuned for balanced on and off-road use — no need for separate shock upgrades.
• Our technicians install these kits every week — faster turnaround, fewer comebacks, guaranteed fit.

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