6 Inch Lift Kit | Diesel | 4-link | M1 | Ford F-250/f-350 Super Duty (17-22)

Built for diesel F-250 and F-350 Super Duty owners who want serious ground clearance without sacrificing factory handling, this 6-inch 4-Link lift kit replaces your factory control arms with Rough Country's durable fixed upper arms and adjustable lower control arms. You'll gain aggressive stance and improved suspension travel while maintaining proper caster geometry through radius arm drop brackets — critical to keeping your truck's steering and ride quality stock-like.

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

• Box Kit — structural foundation for the lift assembly.
• 4.5–6 inch Upper Arm Kit — fixed upper control arms engineered to work with the 4-Link geometry and maintain proper caster angles.
• 4.5–6 inch Lower Arms — adjustable lower control arms for fine-tuned suspension geometry and alignment.
• 4.5 Inch Block U-Bolt Kit (no overloads) — rear lift block with anti-axle wrap technology to eliminate binding and preserve ride quality.
• CV Front Driveshaft — constant-velocity driveshaft engineered for diesel F-250/F-350 4WD models to accommodate the increased suspension travel.
• Universal U-Bolt Kit — secondary fastening hardware for secure block installation.
• 6 Inch Coil Box — lifted coil springs delivering the 6-inch gain while improving suspension articulation.
• M1 Monotube Shock Absorbers (2 pairs) — nitrogen-charged shocks tuned for on- and off-road performance, offering smooth highway ride and controlled off-road dampening.
• Extended Stainless Steel Brake Lines & Brackets — ensures brake system geometry is corrected for the lifted suspension.

Important notes

• Diesel engines only — does NOT fit gas F-250/F-350 models.
• 4WD required — does NOT fit 2WD configurations.
• Manual shift transfer cases not compatible — automatic or electronic shift transfer cases only.
• No dually models — single-rear-wheel frames only.
• 3.5 inch rear axle tube incompatible — verify your axle tube diameter before purchase.
• No factory overload springs — does NOT work with OE rear contact overload springs.
• Tremor Factory Trim Package not compatible — verify trim package with us before ordering.
• CV driveshaft required — front driveshaft replacement is included in this kit to handle increased suspension angles at ride height.

Why customers pick this at Road Runner

• Radius arm drop brackets preserve factory caster geometry — your truck handles and steers like stock, not like a lifted truck with pulled geometry.
• Fabricated anti-wrap rear blocks outlast cast blocks and eliminate common lift-kit binding and axle wrap issues.
• Rough Country lifetime replacement warranty backed by local Road Runner technicians who service these kits every week.
• Professional alignment performed in-house after every lift install — included as part of the service.
• Diesel-specific CV driveshaft included — no guessing about compatibility or waiting for separate orders.

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