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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 Vertex | Ford F-250/f-350 Super Duty (17-22)

Part #: 55659UPC: 840269914898Brand: Rough Country

$3,509.95

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 Super Duty owners who want 6 inches of lift without sacrificing ride quality, this Rough Country Radius Arm Coilover Conversion kit replaces your factory independent coil setup with a complete suspension overhaul. You'll gain up to 37-inch tire clearance while preserving factory-like suspension geometry 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

  • 6" Kit Box | Coilover Conversion — Top-mounted reservoir brackets and coil-over mounts fabricated from 1/4-inch steel, engineered to accept 2.5-inch Vertex coilovers and handle sustained damping loads.
  • Vertex 2.5 Adjustable Front Coilovers (LH & RH) — Nitrogen-charged, 8-stage adjustable monotube shocks with 56% greater fluid capacity than average reservoir shocks, paired with external reservoirs for superior oil capacity and damping sensitivity.
  • Vertex 2.5 Rear Coilovers (qty 2) — Matching monotube rear shocks engineered for optimal load control and ride consistency.
  • Radius Arm Kit Box & Upgrade Boxes — Ultra-durable radius arms at 27 lbs each, precision-fit to factory mounts with durable rubber bushings for vibration absorption and factory-like suspension angles.
  • 4.5 In Block U-Bolt Kit (No Overloads) — Fabricated lift blocks stronger and longer-lasting than cast equivalents, with specially designed anti-axle wrap geometry to maintain stock ride quality.
  • Transfer Case Clocking Kit — Re-indexes the transfer case to preserve driveline geometry and eliminate binding.

Important notes

  • 10-speed transmission models require removal of the dial pin before installation.
  • Does NOT fit gas engine models, manual shift transfer cases, or dually configurations.
  • Does NOT fit vehicles equipped with the Tremor Factory Trim Package.
  • New fabricated lift block replaces factory-equipped lift block — not compatible with factory blocks.
  • Installation requires cutting and drilling; allow 6–10 hours for professional completion.

Why customers pick this at Road Runner

  • Geometry-corrected radius arms maintain factory-like suspension angles — no harsh ride or accelerated wear.
  • Rough Country's limited lifetime replacement warranty backed locally — coverage against structural and workmanship defects from day one.
  • Professionally installed by technicians who complete these kits every week — precision fitment and transfer-case re-indexing handled in-house.
  • Alignment performed in-house as part of every lift install — included, not an add-on.
  • 2.5-inch Vertex coilovers with 8-stage adjustability — tune your ride on the fly without replacing shocks.
  • All-inclusive kit eliminates guesswork — radius arms, coilovers, blocks, and transfer-case clocking kit ship together.

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

QtyPartPart #
1Transfer Case Clocking Kit | Ford Super Duty (17-24)55003
2Vertex 2.5 RR 6 In | Ford Super Duty (17-25)695805
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.