Skip to content
★★★★★ 4.9 (625 Google reviews) · Marietta shop · 📞 (678) 400-6467 · 🗺️ Get Directions · Live From The Shop
Google ★★★★★ Loading recent review… See all 625 →
Cart

Rough Country · Authorized Dealer

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

Part #: 55440UPC: 840269917943Brand: Rough Country

$1,739.95

Price does not include installation.

Pay over time

*Estimated lease-to-own payment. Final approval and terms are determined by the lender. See all financing options →

🛠️ Install available in Marietta, GA

Installed and serviced at Road Runner Wheels & Tires — 1585 Roswell Rd, Marietta, GA 30062. Call (678) 400-6467 to schedule.

Loading stock…
Call (678) 400-6467

Built for Super Duty owners who want 6 inches of ground clearance without sacrificing factory handling, this Rough Country radius arm lift kit transforms your truck's capability while preserving smooth on-road and off-road ride quality. You'll run 35"–37" tires and maintain proper suspension geometry thanks to caster-correcting radius arm drop brackets.

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 — secures the rear lift blocks to the axle for a solid foundation.
  • Radius Arm Kit Box — factory-mount precision-fit arms that preserve suspension geometry and driveability.
  • Radius Arm Upgrade Box (qty 2) — dual upgrade boxes deliver 27 lbs each of ultra-durable material with rubber bushings to absorb vibration and maintain ride quality.
  • Transfer Case Clocking Kit — re-indexes the transfer case to correct driveline angles after lift.
  • Universal 3/4" × 1 1/2" U-Bolt Kit — additional fastening hardware for secure component attachment.
  • 6 Inch Coil Springs — lifted coils raise the front and work with radius arms to level the truck.
  • M1 Monotube Shock Pair (qty 2) — application-valved N3 series monotube shocks deliver balanced on- and off-road performance while the anti-axle wrap design eliminates common lift-block binding issues.

Important notes

  • Does NOT fit gas engine models, dually models, or manual shift transfer cases.
  • Does NOT fit models with 3.5" rear axle tube.
  • ONLY fits models equipped with rear factory contact overload springs.
  • Does NOT work on models equipped with Tremor Factory Trim Package.

Why customers pick this at Road Runner

  • Radius arm drop brackets correct caster — the geometry stays factory-close, so handling and driveability don't suffer.
  • Fabricated anti-wrap rear blocks are stronger than cast alternatives and engineered to prevent axle wrap and binding.
  • Professionally installed by techs who perform these lifts every week — transfer case clocking and all.
  • Alignment performed in-house as part of every lift install.
  • Rough Country lifetime warranty backed locally — supported by Road Runner from install day forward.

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

QtyPartPart #
16.5 In Block U-Bolt Kitoverloads | Ford Super Duty (17-22)1550BOX2
1Radius Arm Kit Box | Ford Super Duty (17-22)512BOX1
1Transfer Case Clocking Kit | Ford Super Duty (17-24)55003
1M1 MONOTUBE SHOCK PAIR770754P
1M1 MONOTUBE SHOCK PAIR770805P
1Univ. 3 4 X 4 1 X 1 2in U-Bolt Kit | Ford Super Duty (17-22)7675
16 Inch Coil Box | Ford Super Duty (05-22)9296
1Radius Arm Upgrade Box | Ford F-250/F-350 Super Duty 4WD (2005-2022)53600991A
1Radius Arm Upgrade Box | Ford F-250/F-350 Super Duty 4WD (2005-2022)53600992A

Features

  • Easy bolt-on installation
  • Increased ground clearance
  • Levels the front with the rear of the vehicle
  • Radius arm drop brackets allow for properly set caster. Proper caster is crucial to maintaining factory handling and driveability.
  • Includes application valved N3 series shock absorbers which offer the best in balanced performance for on and off-road use.
  • Fabricated blocks are stronger and offer a longer lifespan than cast blocks.
  • Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem.
YearsMakeModelDrive
2017-2022FordF-250 Super Duty King Ranch4WD
2017-2022FordF-250 Super Duty Lariat4WD
2017-2022FordF-250 Super Duty Platinum4WD
2017-2022FordF-250 Super Duty XL4WD
2017-2022FordF-250 Super Duty XLT4WD
2018-2022FordF-250 Super Duty Limited4WD
2017-2022FordF-350 Super Duty King Ranch4WD
2017-2022FordF-350 Super Duty Lariat4WD
2017-2022FordF-350 Super Duty Platinum4WD
2017-2022FordF-350 Super Duty XL4WD
2017-2022FordF-350 Super Duty XLT4WD
2018-2022FordF-350 Super Duty Limited4WD
  • Tire size: 35″ to 37″ tall
  • Lift height: 6″
Does NOT fit gas engine models. Does NOT fit dually models. Does NOT fit manual shift transfer cases Does NOT fit models with 3.5" rear axle tube ONLY fits models equipped with rear factory contact overload springs Does NOT work on models equipped with Tremor Factory Trim Package

Rough Country Lifetime Replacement Warranty covers all structural components against defects in materials and workmanship for the original purchaser's lifetime ownership of the vehicle.

3-Year Finish Warranty on all painted and powder-coated surfaces.

3-Year Shock Warranty on N3, M1, and Vertex shocks against leakage and structural failure.

Warranty service is handled by Rough Country directly — call (678) 400-6467 if you need help opening a warranty claim and we'll walk you through it.