6 Inch Lift Kit | Gas | Radius Arm | C/o Vertex | Ford F-250/f-350 Super Duty (05-07)

Built for first-generation Super Duty owners who want a commanding 6-inch lift without sacrificing ride quality, this Rough Country Radius Arm Coilover Conversion Suspension Lift transforms your truck's geometry while keeping suspension angles factory-true. Run up to 37-inch tires and experience improved ground clearance with a smooth, composed ride preserved by precision engineering.

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" Kit Box (Coilover Conversion) — Includes top-mounted reservoir brackets and coil-over mounts fabricated from 1/4-inch steel for superior durability and longer lifespan than cast blocks.
• Vertex 2.5" Adjustable Coilovers (front pair, 4.5"–6" range) — Nitrogen-charged, 8-stage adjustable monotube shocks with external reservoir, 56% greater fluid capacity than average reservoir shocks for optimal damping control and ride refinement.
• Vertex 2.5" Rear Coilovers (pair, 6" setting) — Match the front setup with precision-tuned rear damping.
• Heavy-Duty Radius Arm Upgrade (pair) — 27-lb beefed-up arms with durable rubber bushings for maximum vibration absorption; bolt directly into factory mounts and maintain factory suspension angles.
• Adjustable Alignment Cam — Allows caster adjustment at the axle for geometry correction after install.
• Add-A-Leaf (rear) — Reinforces rear spring capacity to handle the new ride height.
• 3-Inch Block and U-Bolt Kit (rear) — Raises the rear axle to match front lift height.

Important notes

• Does not fit dually models.
• Factory rear contact overload springs must be removed during installation.
• Installation requires cutting and drilling; plan for 6–10 hours of work or professional installation.

Why customers pick this at Road Runner

• Factory-angle geometry preserved — heavy-duty radius arms bolt into OEM mounts, keeping suspension true after the lift.
• Precision alignment included — adjustable caster cam and in-house alignment ensure your truck tracks straight and tire wear stays even.
• Lifetime warranty backed locally — Rough Country's industry-leading limited lifetime replacement warranty on structural and workmanship defects, supported by Road Runner's service team.
• Professional installation by suspension specialists — our technicians install these kits weekly and know every critical step.
• Smooth, composed ride — Vertex monotube design with 56% greater fluid capacity delivers damping control far beyond budget kits.

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