6-Inch Vertex Lift Kit for Ford Super Duty 4WD (2017-2022) — Part 51756
- Fits 2017-2022 Ford F-250 and F-350 Super Duty 4WD in XL through Limited trims
- Excludes gas engines, dually axles, manual-shift transfer cases, and Tremor package trucks
- Requires factory rear contact overload springs
- Vertex 2.5 adjustable front coilovers (left and right) set for 4.5-in to 6-in, plus a V2 monotube shock pair
- Fabricated anti-axle-wrap rear blocks with 6.5-in block U-bolt kit and transfer case clocking kit
- Bolt-on install; downloadable installation guide available. Shipping weight: 288.3 lb
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Gas engine models
- Dually models
- Manual shift transfer cases ONLY fits models equipped with rear factory contact overload springs
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 Lift Kit, fitment-checked
Rough Country 51756 is a 6-inch lift kit for the 2017-2022 Ford F-250 and F-350 Super Duty 4WD, built around a left/right pair of Vertex 2.5 adjustable front coilovers and a V2 monotube rear shock pair. It is diesel-only and single-rear-wheel only: gas engines, dually axles, manual-shift transfer cases, and the Tremor trim package are all outside the fitment, and the truck must have the factory contact overload springs at the rear.
This 6-inch lift kit for the 2017-2022 Ford F-250/F-350 Super Duty 4WD covers XL, XLT, Lariat, King Ranch, Platinum, and Limited trims in 4WD form. The kit converts the front to Vertex 2.5 adjustable coilovers set for the 4.5-in to 6-in range, adds radius arm drop brackets so caster can be set correctly, and pairs fabricated anti-axle-wrap rear blocks with a 6.5-in block U-bolt kit and V2 monotube shocks. A transfer case clocking kit is included. Confirm the diesel, non-dually, and overload-spring requirements first, then work from the downloadable installation guide, which covers both the kit and the coilover steps.
What’s in the box
Kit contents
- 1× Univ. 3 4 X 4 1 X 1 2in U-Bolt Kit 7675
- 1× Transfer Case Clocking Kit 55003
- 1× V2 MONOTUBE SHOCK PAIR 760805-2
- 1× Kit Box 1504991
- 1× 6" Kit Box 50010991
- 1× 6.5 In Block U-Bolt Kitoverloads 1550BOX2
- 1× Vertex 2.5 Adj FR Lh 4.5IN-6.IN 685042L
- 1× Vertex 2.5 Adj FR Rh 4.5IN-6.IN 685042R
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 51756 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 51756 |
| UPC / GTIN | 00840269914621 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 288.3 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here