6-Inch Vertex Coilover Lift Kit for Ford Super Duty 4WD (2017–2022) for Trucks without Overloads
- Fits 2017–2022 Ford F-250 and F-350 Super Duty 4WD, XL through Limited — review all exclusions below
- Vertex 2.5 adjustable left and right front coilovers plus a V2 monotube shock pair
- Includes radius arms, transfer case clocking kit, 4.5-inch fabricated rear block and U-bolt hardware
- Not for gas engines, manual shift transfer cases, dually models, or the Tremor Factory Trim Package
- 10-speed transmission trucks: dial pin must come out during the install
- Downloadable installation guide available — shipping weight: 324.0 lb
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Gas engine models
- Manual shift transfer cases
- Dually models
Models equipped with a 10-speed transmission must remove dial pin. New fabricated lift block replaces the factory equipped lift block. Does NOT work on models equipped with Tremor Factory Trim Package. Fitment on this page is based on the manufacturer’s application data.
About this kit
6-Inch Vertex Coilover Lift Kit for Ford Super Duty 4WD (2017–2022), fitment-checked
Rough Country 55858 is a 6-inch lift kit for 2017–2022 Ford F-250 and F-350 Super Duty 4WD trucks, built around a front coilover conversion with Vertex 2.5 adjustable front units and a V2 monotube shock pair out back. Diesel, electronic-shift transfer case, single-rear-wheel trucks only: it does not cover gas engines, manual shift transfer cases, dually axles, or the Tremor Factory Trim Package.
This 6-inch lift kit for the 2017–2022 Ford F-250 and F-350 Super Duty 4WD converts the front end to coilovers using Vertex 2.5 adjustable front units, then pairs a V2 monotube shock set with a 4.5-inch fabricated rear block and matching U-bolts. Radius arms and a transfer case clocking kit are also part of the box. Coverage runs XL through Limited on the trims shown in the fitment section. Trucks with the 10-speed transmission require the dial pin to be removed. Check the exclusion list first, then work from the downloadable installation guide. Shipping weight: 324.0 lb.
What’s in the box
Kit contents
- 1× Univ. 3 4 X 4 1 X 1 2in U-Bolt Kit 7673
- 1× Transfer Case Clocking Kit 55003
- 1× V2 MONOTUBE SHOCK PAIR 760805-2
- 1× 6" Kit Box 50010991
- 1× 4.5 In Block U-Bolt Kit No Overloads 1563BOX4
- 1× Radius Arm Kit Box 512BOX1
- 1× Vertex 2.5 Adj FR Lh 4.5IN-6.IN 685042L
- 1× Vertex 2.5 Adj FR Rh 4.5IN-6.IN 685042R
- 1× Radius Arm Upgrade Box 53600991A
- 1× Radius Arm Upgrade Box 53600992A
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 55858 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 55858 |
| UPC / GTIN | 00840269914928 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 324 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here