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 — check the fitment list
- Diesel only: gas engines, dually axles, manual-shift transfer cases, and Tremor-package trucks are excluded
- Requires factory rear contact overload springs; not for a 3.5-inch rear axle tube
- Kit contents: 2x Vertex 2.5 front and 2x Vertex 2.5 rear shocks, 6-inch coils, 6.5-inch fabricated rear blocks, front CV driveshaft
- Downloadable installation guide available; shipping weight: 308.35 lb
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
Rough Country 51751 is a 6-inch lift kit for 2017-2022 Ford F-250 and F-350 Super Duty 4WD trucks, built around Vertex 2.5 front and rear shocks. Diesel-only fitment: the kit ships with a front CV driveshaft, and the truck must have factory rear contact overload springs. Gas engines, dually axles, manual-shift transfer cases, a 3.5-inch rear axle tube, and the Tremor trim package are all outside this application.
Diesel Super Duty owners are the audience for this 6-inch lift kit for the 2017-2022 Ford F-250 and F-350 Super Duty 4WD, which spans XL through Limited trims in the fitment list. Contents run to a pair of Vertex 2.5 front shocks and a pair of Vertex 2.5 rear shocks, a 6-inch coil package, a 6.5-inch fabricated anti-axle-wrap block and U-bolt set, a universal U-bolt kit, and a front CV driveshaft for the diesel driveline. Radius arm drop brackets bring caster back where the factory set it. A downloadable installation guide is available.
What’s in the box
Kit contents
- 1× 6 Inch Coil Box 9296
- 1× 6.5 In Block U-Bolt Kitoverloads 1550BOX2
- 1× Kit Box 1504991
- 1× Univ. 3 4 X 4 1 X 1 2in U-Bolt Kit 7675
- 1× CV Drive Shaft 5068.1
- 2× Vertex 2.5 FR 6 In 685754
- 2× Vertex 2.5 RR 6 In 695805
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 51751 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 51751 |
| UPC / GTIN | 00843030169725 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 308.35 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here