6-Inch Vertex Coilover Lift Kit for Ford Super Duty 4WD for Trucks with Overloads
- Fits 2017–2022 Ford F-250 and F-350 Super Duty 4WD — see the full fitment list for trim coverage
- Vertex 2.5 adjustable front coilovers (left and right) plus a V2 monotube shock pair
- Includes a radius arm kit and radius arm upgrade boxes, transfer case clocking kit, and 6.5 in fabricated block with U-bolts
- Does not fit gas engine, manual shift transfer case, dually, or Tremor factory trim package trucks
- 10-speed transmission trucks require the dial pin to be removed
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, fitment-checked
Rough Country 51258 is a 6-inch lift kit for 2017–2022 Ford F-250 and F-350 Super Duty 4WD trucks, built around a Vertex 2.5 adjustable front coilover conversion with V2 monotube shocks out back. It does not fit gas engine trucks, manual shift transfer cases, dually models, or trucks with the Tremor factory trim package.
This 6-inch lift kit for the 2017–2022 Ford Super Duty 4WD covers F-250 and F-350 diesel trucks from XL through Limited, including King Ranch, Lariat, Platinum, and XLT. The kit pairs left and right Vertex 2.5 adjustable front coilovers with a radius arm upgrade, a transfer case clocking kit, a V2 monotube shock pair, and a 6.5 in fabricated rear block and U-bolt package that replaces the factory block. Trucks with the 10-speed transmission require removal of the dial pin. Check the exclusion list against your build before ordering.
What’s in the box
Kit contents
- 1× Transfer Case Clocking Kit 55003
- 1× V2 MONOTUBE SHOCK PAIR 760805-2
- 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 51258 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 51258 |
| UPC / GTIN | 00840269914515 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 301 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here