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★★★★★ 4.9 (625 Google reviews) · Marietta shop · 📞 (678) 400-6467 · 🗺️ Get Directions · Live From The Shop
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Rough Country · Authorized Dealer

6 Inch Lift Kit | R/a | No Ovld | C/o V2 | Ford F-250/f-350 Super Duty (17-22)

Part #: 55658UPC: 840269915109Brand: Rough Country

$2,869.95

Price does not include installation.

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*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.

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Built for Ford Super Duty owners who want maximum ground clearance without sacrificing factory ride quality, this 6-inch Radius Arm Coilover Conversion Lift Kit delivers the geometry correction and durability you need for serious terrain. Run up to 37-inch tires while preserving smooth suspension angles through precision-fit radius arms and 2.5-inch Vertex Coilovers with external reservoirs.

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

  • 4.5 In Block U-Bolt Kit (No Overloads) — Fabricated steel blocks that replace factory cast units, engineered to eliminate common lift-block problems while maintaining durability and ride quality.
  • 6" Coilover Conversion Box — Top-mounted reservoir brackets and coil-over mounts constructed from 1/4-inch steel, designed to accommodate the larger 2.5-inch piston Vertex shocks.
  • Radius Arm Kit & Upgrade Box (qty 2) — Ultra-durable radius arms at 27 lbs each, precision-fitted to factory mounts for easier installation and factory-like suspension geometry, with durable rubber bushings for vibration absorption.
  • Transfer Case Clocking Kit — Allows re-indexing of the transfer case to maintain proper driveline angles after the 6-inch lift.
  • Vertex 2.5" Adjustable Front Coilovers (Pair) — Nitrogen-charged, 8-stage adjustable monotube design with external reservoir offering 56% greater fluid capacity than standard reservoir shocks, delivering optimal damping control and ride quality.
  • V2 Monotube Shock Pair — Premium dampers paired with the coilover system for consistent performance across all terrain.

Important notes

  • Does NOT fit gas engine models — diesel only.
  • Does NOT fit manual shift transfer cases — automatic transmission required.
  • Does NOT fit dually models.
  • Does NOT work on models equipped with Tremor Factory Trim Package.
  • 10-speed transmission models must have the dial pin removed during installation.
  • New fabricated lift block replaces the factory-equipped unit; cutting and drilling required during install.

Why customers pick this at Road Runner

  • Geometry-corrected radius arms preserve factory suspension angles — no harsh ride or accelerated wear.
  • Locally backed Rough Country limited lifetime replacement warranty on all structural and workmanship defects.
  • Professional installation by technicians who perform these conversions every week — tight tolerances and driveline re-indexing done right.
  • Alignment performed in-house as part of every lift install, ensuring proper caster, camber, and toe from day one.
  • Ultra-durable 2.5-inch Vertex Coilovers with external reservoirs and 8-stage adjustment — proven reliability on serious trucks.

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

QtyPartPart #
1Transfer Case Clocking Kit | Ford Super Duty (17-24)55003
1V2 MONOTUBE SHOCK PAIR760805-2
16" Kit Box | Coilover Conversion | Ford Super Duty (17-22)50010991
14.5 In Block U-Bolt Kit No Overloads | Ford Super Duty (11-22)1563BOX4
1Radius Arm Kit Box | Ford Super Duty (17-22)512BOX1
1Vertex 2.5 Adj FR Lh 4.5IN-6.IN | Ford F250/F350 4WD (05-22)685042L
1Vertex 2.5 Adj FR Rh 4.5IN-6.IN | Ford F250/F350 4WD (05-22)685042R
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.
  • Includes durable radius arms.
  • 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″
Models equipped with a 10-speed transmission must remove dial pin. Does NOT fit gas engine models. Does NOT fit manual shift transfer cases. Does NOT fit dually models. New fabricated lift block replaces the factory equipped lift block. 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.