6-Inch Vertex Coilover Lift Kit for Ford Super Duty 4WD (2023–2026)
- Fits 2023–2026 Ford F-250 and F-350 Super Duty 4WD, XL through Limited — diesel engines only
- Does not fit gas-engine models, dually models, or trucks with the Tremor Off-Road Package (approximately 1.5-inch factory lift)
- Kit includes left and right Vertex 2.5 adjustable front coilovers, driver and passenger tubular radius arm boxes, and two V2 monotube shock pairs
- Rear ride height handled by a fabricated 6.5-inch block and U-bolt kit designed to limit axle wrap
- Bolts to factory mounting points — no cutting or drilling; downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Models equipped with a gas engine
- Dually models
Does NOT ft models equipped with Tremor Off-Road Package as they are equipped with approximately a 1.5-inch factory lift. 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 400458 is a 6-inch lift kit for 2023–2026 Ford F-250 and F-350 Super Duty 4WD models, built around a pair of height-adjustable Vertex 2.5 front coilovers, tubular radius arms with a 2-inch outer diameter, fabricated rear blocks with a U-bolt kit, and two V2 monotube shock pairs. It does not fit gas-engine trucks, dually axles, or trucks with the Tremor Off-Road Package.
This 6-inch lift kit for the 2023–2026 Ford F-250/F-350 Super Duty 4WD replaces the front suspension with adjustable Vertex 2.5 coilovers on 1/4-inch fabricated mounts, so you can dial in the front ride height and take out factory rake. Tubular radius arms restore caster and keep the front geometry close to stock, while fabricated rear blocks address axle wrap. A second V2 monotube front shock per side adds damping control. Fitment covers XL through Limited trims — diesel only, no dually, no Tremor. Bolt-on installation with no cutting or drilling; a downloadable installation guide is available.
What’s in the box
Kit contents
- 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× 6.5 In Block U-Bolt Kit 41200992
- 1× Kit Box 400330991
- 1× 6" Kit Box 400258991
- 1× V2 MONOTUBE SHOCK PAIR 760805-2
- 1× Radius Arm Pass Upgrade Box 43701991A
- 1× Radius Arm Dr Upgrade Box 43701992A
- 1× V2 MONOTUBE SHOCK PAIR 760818-2
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 400458 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 400458 |
| UPC / GTIN | 00840269972935 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 165 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here