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

Built for F-250 Super Duty diesel owners who want aggressive stance without sacrificing ride quality — this 6-inch radius arm lift kit raises your truck 6 inches while preserving factory suspension geometry. With a recommended tire range of 35–37 inches, you get serious ground clearance and a commanding presence that doesn't compromise drivability.

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

• Vertex 2.5 Front Shocks (qty 2) — precision-tuned for a balanced on and off-road ride.
• Vertex 2.5 Rear Shocks (qty 2) — paired with N2.0-spec damping for smooth handling at full lift height.
• Radius Arm Upgrade Boxes (qty 2) — heavy-duty units with durable rubber bushings that absorb vibration while maintaining factory-correct suspension angles; each weighs 27 lbs and bolts directly to factory mounts.
• Diesel Kit Box — engine-specific bracketing and relocation components.
• Block U-Bolt Kit with Overloads — specially designed anti-axle wrap rear blocks that preserve stock ride quality while eliminating common lift-block issues; fabricated steel construction outlasts cast alternatives.
• 6-inch D-Coil Spring — lifted coil spring for the rear axle.
• Adjustable Alignment Cam — allows caster correction at the axle after install.
• Track Bar Relocation Bracket — maintains proper suspension geometry under load.
• Drop Pitman Arm — preserves steering angles and feel.
• Brake Line Relocation Brackets — safely repositions brake lines away from suspension travel.

Important notes

• This kit is designed for 2011–2014 F-250 Super Duty diesel models only. It does not fit F-350, dually, or gas-engine variants.
• Your F-250 must be equipped with factory rear contact overload springs for this kit to install correctly.
• The adjustable alignment cam enables caster correction, but professional alignment is recommended after install to dial in your specific driveline geometry.

Why customers pick this at Road Runner

• Radius arms preserve factory suspension angles — no binding, no premature wear, no clunky ride.
• 100% bolt-on installation with no cutting or drilling — saves time and keeps your frame intact.
• Rough Country Lifetime Replacement Warranty backed by local service and support.
• Alignment performed in-house as part of every lift install — we dial in caster and geometry the day you pick up your truck.
• Fabricated blocks and bushings rated for daily driving and weekend trail use.

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