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 want 6 inches of ground clearance without sacrificing handling or geometry, this Rough Country 4-Link lift kit pairs fixed upper arms with adjustable lower control arms for a smooth, predictable ride both on and off the road. Radius arm drop brackets maintain proper caster angles — critical for factory-like steering feel and drivability — while fabricated anti-wrap blocks eliminate the binding and axle wrap common to lift-block setups. You'll fit 35″–37″ tires comfortably and gain the aggressive stance that turns heads at the truck stop or trailhead.

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 In Block U-Bolt Kit — Reinforced fastening hardware for the rear lift blocks, engineered to handle the stress of a 6-inch raise.
• Box Kit — Structural mounting platform that integrates the new coil spring setup and locates the suspension geometry correctly.
• 4.5–6in Up Arm Kit — Fixed upper control arms pre-positioned to maintain proper suspension angles across the full lift range.
• 4.5–6in Lower Arms — Adjustable lower control arms that let you dial in caster and camber for personalized handling after install.
• Transfer Case Clocking Kit — Re-indexes the transfer case output to prevent binding and driveshaft vibration at full compression.
• Universal 3/4 X 4 1 1/2in U-Bolt Kit — Heavy-duty fastening for axle perches, rated for lifted duty cycles.
• M1 Monotube Shock Absorbers (Front Pair) — Single-tube nitrogen-charged units tuned for balanced on- and off-road performance.
• M1 Monotube Shock Absorbers (Rear Pair) — Matches the front pair for consistent damping across the suspension.
• 6 Inch Coil Box — Lifted coil springs with matched valving to maintain proper ride height and spring rate under load.

Important notes

• Diesel engines only — does not fit gas models.
• Automatic transmission only — does not fit manual shift transfer cases.
• Does not fit dually models.
• Requires factory contact overload springs on the rear axle — does not fit 3.5″ rear axle tubes.
• Incompatible with Ford Tremor Factory Trim Package.
• This kit replaces your factory lift block entirely — new fabricated block ships as part of the kit.

Why customers pick this at Road Runner

• Caster correction is built in — radius arm drop brackets mean your steering stays crisp and on-center after lift, no pulling or wandering.
• Rough Country Lifetime Replacement Warranty backed by our service team right here; we stand behind every install.
• Professionally installed by technicians who perform these lifts every week — no guesswork, proper geometry dialed every time.
• Alignment performed in-house as part of every lift install — your truck leaves level and tracking true.
• Anti-wrap rear blocks preserve stock ride quality without the axle bind and chatter you get from lesser designs.

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