6-Inch Lift Kit with Vertex Shocks for F-250/F-350 4WD (2017–2022)
- Fits 2017–2022 Ford F-250 and F-350 Super Duty 4WD, XL through Limited — review every exclusion below
- Does not fit gas engine, dually, manual-shift transfer case, 3.5-inch rear axle tube, or Tremor Factory Trim Package trucks
- Only for trucks equipped with rear factory contact overload springs
- Kit contents include four Vertex 2.5 shocks, 6-inch coils, radius arm drop brackets, 6.5-inch rear blocks with U-bolts, and a transfer case clocking kit
- Bolt-on install with a downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Gas engine models
- Dually models
- 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
About this kit
6-Inch Lift Kit with Vertex Shocks, fitment-checked
A 6-inch lift kit for 2017–2022 Ford F-250 and F-350 Super Duty 4WD models, built around four Vertex 2.5 shocks, a coil package, radius arm drop brackets, and fabricated rear blocks with U-bolts. Diesel models with factory contact overload springs only — gas engines, duallys, manual-shift transfer cases, 3.5-inch rear axle tubes, and the Tremor package are all outside this application.
This 6-inch lift kit for the 2017–2022 Ford F-250/F-350 Super Duty 4WD arrives as a full box set: a 6-inch coil box, a radius arm kit with upgrade boxes, a 6.5-inch block and U-bolt package, a transfer case clocking kit, and two front plus two rear Vertex 2.5 shocks. Radius arm drop brackets reset caster so steering geometry stays close to factory, and the rear blocks are fabricated rather than cast. Confirm your truck runs a diesel engine, an electronic-shift transfer case, and factory contact overload springs before ordering. A downloadable installation guide is available. Shipping weight: 367.62 lb.
What’s in the box
Kit contents
- 1× 6 Inch Coil Box 9296
- 1× 6.5 In Block U-Bolt Kitoverloads 1550BOX2
- 1× Radius Arm Kit Box 512BOX1
- 1× Univ. 3 4 X 4 1 X 1 2in U-Bolt Kit 7675
- 1× Transfer Case Clocking Kit 55003
- 2× Vertex 2.5 FR 6 In 685754
- 2× Vertex 2.5 RR 6 In 695805
- 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 55450 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 55450 |
| UPC / GTIN | 00843030190163 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 367.62 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here