6 Inch Lift Kit | Diesel | Radius Arm | Ovld | V2 | Ford F-250 Super Duty (15-16)

Built for F-250 Super Duty diesel owners who want a 6-inch lift without compromising factory suspension geometry, this radius arm lift kit delivers aggressive ground clearance while preserving the angles that keep your truck riding smooth on and off road. Rough Country engineered it to handle 35"–37" tires and maintain the factory-like geometry that separates a quality lift from a rough one.

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

• Radius Arm Upgrade Box (qty 2) — Heavy-duty radius arms equipped with durable rubber bushings for maximum vibration absorption; precision-fit to factory mounts with an adjustable alignment cam at the axle for caster correction.
• 6-inch D-Coil Springs — Fabricated coil springs engineered to deliver the 6-inch lift while maintaining balanced ride quality.
• V2 Monotube Shock Pair (qty 2) — Application-valved shocks tuned for balanced on and off-road performance on lifted Super Duties.
• Block U-Bolt Kit with Overloads — Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problems.
• Track Bar Relocation Bracket & Drop Pitman Arm — Preserves factory angles and allows proper caster adjustment throughout the suspension envelope.
• Brake Line Relocation Brackets — Ensures safe routing and function after the lift is installed.

Important notes

• This kit is engineered for 2015–2016 F-250 Super Duty diesel models without rear factory contact overload springs. Does not fit F-350 models, dually models, or gas engine models.
• Recommended tire size range is 35"–37". Stay within this window to preserve geometry correction and driveline angles.
• The adjustable alignment cam at the axle allows caster correction; professional alignment is critical to maintaining factory-like geometry after install.

Why customers pick this at Road Runner

• 100% bolt-on installation — no cutting, drilling, or fabrication; most kits complete the same day you drop it off.
• Radius arm design preserves factory suspension angles, delivering a balanced ride on pavement and trail without the jarring feel of cheaper lift blocks.
• Rough Country Lifetime Replacement Warranty backed locally — we handle warranty claims and parts replacement right here.
• Professional alignment performed in-house as part of every lift install — caster is corrected and verified before you drive home.
• Technicians who install these kits weekly understand F-250 diesel geometry and common fitment details; we catch issues before they become problems.

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