6-Inch Vertex Lift Kit for Ford Super Duty 4WD (2017-2022) — Part 55459
- Fits 2017-2022 Ford F-250 and F-350 Super Duty 4WD in the listed trims — diesel only
- Excludes gas engines, manual shift transfer cases, dually models, and the Tremor Factory Trim Package
- Adjustable Vertex 2.5 front coilovers (4.5-6 in range) plus two Vertex 2.5 rear shocks
- Fabricated 6.5-inch rear anti-axle-wrap block takes the place of the factory block
- 10-speed transmission trucks require removal of the dial pin
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 Lift Kit, fitment-checked
Rough Country 55459 is a 6-inch lift kit for 2017-2022 Ford F-250 and F-350 Super Duty 4WD models, built around adjustable Vertex 2.5 front coilovers and a pair of Vertex 2.5 rear shocks. It does not fit gas engine models, manual shift transfer cases, dually models, or trucks with the Tremor Factory Trim Package.
This 6-inch lift kit for the 2017-2022 Ford F-250/F-350 Super Duty 4WD covers XL, XLT, Lariat, King Ranch, Platinum, and Limited trims in the fitment list. The box carries left and right adjustable Vertex 2.5 front coilovers set for the 4.5- to 6-inch range, two Vertex 2.5 rear shocks, radius arm boxes, a transfer case clocking kit, U-bolt hardware, and a fabricated 6.5-inch rear block that replaces the factory block. Trucks with the 10-speed transmission need the dial pin removed. Shipping weight: 359 lb.
What’s in the box
Kit contents
- 1× Univ. 3 4 X 4 1 X 1 2in U-Bolt Kit 7675
- 1× Transfer Case Clocking Kit 55003
- 2× Vertex 2.5 RR 6 In 695805
- 1× 6" Kit Box 50010991
- 1× 6.5 In Block U-Bolt Kitoverloads 1550BOX2
- 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 55459 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 55459 |
| UPC / GTIN | 00840269914645 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 359 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here