6-Inch Vertex Coilover Lift Kit for Ford Super Duty 4WD (2017–2022) with Vertex Rear Coilovers
- Fits 2017–2022 Ford F-250 and F-350 Super Duty 4WD in XL, XLT, Lariat, King Ranch, Platinum, and Limited trims
- Front: adjustable Vertex 2.5 coilovers (left and right, 4.5-inch to 6-inch range); rear: 2x Vertex 2.5 shocks
- Includes radius arm kit plus two radius arm upgrade boxes, transfer case clocking kit, and 6.5-inch block and U-bolt kit with overloads
- Does not fit gas engine models, manual shift transfer cases, dually models, or the Tremor Factory Trim Package
- 10-speed transmission models require dial pin removal; fabricated lift block replaces the factory block
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, fitment-checked
Rough Country 51259 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 Vertex 2.5 rear shocks. Diesel-only fitment: 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 replaces the front suspension with left- and right-hand adjustable Vertex 2.5 coilovers rated across a 4.5-inch to 6-inch range, and pairs them with two Vertex 2.5 rear shocks. The package also carries a radius arm kit and two radius arm upgrade boxes, a transfer case clocking kit, and a 6.5-inch block and U-bolt set with overloads. Rear blocks are fabricated rather than cast and are shaped to resist axle wrap. Trucks with the 10-speed transmission need the dial pin removed. A downloadable installation guide is available.
What’s in the box
Kit contents
- 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 51259 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 51259 |
| UPC / GTIN | 00840269914607 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 329 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here