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

Built for diesel F-250/F-350 Super Duty owners who demand more ground clearance and aggressive handling without sacrificing drivability, this 6-inch 4-Link lift kit replaces your factory control arms with a fully adjustable setup that levels front-to-rear geometry while maintaining proper caster angles. You'll gain up to 37-inch tire clearance, improved suspension travel, and the factory-grade handling that keeps your truck planted on pavement and capable off-road.

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

• 6.5-inch block U-bolt kit — reinforced overload mounting for rear axle stability.
• Box kit — fabricated frame-mounted bracket assembly that anchors the suspension geometry.
• 4.5–6-inch upper arm kit — fixed control arms engineered for consistent caster and camber under load.
• 4.5–6-inch lower arms — adjustable lower control arms that dial in proper geometry after install.
• Radius arm drop brackets — critical for caster correction; maintains factory-like handling and steering feel.
• CV front driveshaft — diesel-rated constant-velocity shaft engineered to handle the extended suspension articulation.
• Anti-wrap rear blocks — fabricated (not cast) blocks that eliminate axle wrap while preserving ride quality.
• M1 monotube shock pair (front) — Nitrogen-charged dampers tuned for balanced on-road comfort and off-road compliance.
• M1 monotube shock pair (rear) — matching rear shocks for coordinated suspension response.
• 6-inch coil box — lifted coil spring assembly with proper rate and pre-load.
• Extended stainless steel brake lines and brackets — ensures safe stopping power after the lift is installed.

Important notes

• Diesel engine models only — does not fit gas F-250/F-350.
• 4WD only — not compatible with 2WD variants.
• Requires factory contact overload springs; does not fit dually models or vehicles with 3.5-inch rear axle tubes.
• Incompatible with manual shift transfer cases.
• Not compatible with the factory Tremor trim package.
• Fabricated lift block replaces factory block; no stacking or modifications to original components.
• Alignment and caster setup performed in-house after install to restore factory handling geometry.

Why customers pick this at Road Runner

• Rough Country lifetime warranty backed by local installation — we service what we sell, every day of the week.
• Professional alignment and caster correction performed in-house as part of your lift install — no trips to a franchise shop.
• Adjustable lower arms let us fine-tune geometry to your exact truck and wheel setup before you leave.
• Fabricated anti-wrap blocks last longer than cast alternatives and eliminate the binding and noise common in other 4-link kits.
• Diesel-rated CV driveshaft included — no guesswork on compatibility or hidden costs.

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