6-Inch Lift Kit with Vertex Coilovers for Ford Super Duty 4WD — Part 51757
- Fits 2017–2022 Ford F-250 and F-350 Super Duty 4WD in XL through Limited trim — check the fitment list
- Requires rear factory contact overload springs; excludes gas engines, duallys, manual-shift transfer cases, and Tremor Factory Trim Package trucks
- Vertex 2.5 adjustable front coilovers (left and right) plus two Vertex 2.5 rear shocks
- Includes transfer case clocking kit, 6.5-inch fabricated rear blocks, and U-bolt hardware
- Bolt-on install with radius arm drop brackets for caster correction — downloadable installation guide available
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 Lift Kit with Vertex Coilovers, fitment-checked
Rough Country 51757 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 a pair of Vertex 2.5 rear shocks. It fits only trucks with rear factory contact overload springs, and it rules out gas-engine, dually, manual-shift transfer case, and Tremor Factory Trim Package trucks.
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 listed in the fitment section. The box carries left- and right-hand Vertex 2.5 adjustable front coilovers, two Vertex 2.5 rear shocks, a transfer case clocking kit, a 6.5-inch fabricated rear block and U-bolt package, and universal U-bolts. Radius arm drop brackets reset caster so steering feel stays close to factory, and the rear blocks are shaped to resist axle wrap. Confirm your engine, rear spring, and transfer case configuration first, then work from the downloadable installation guide.
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
- 2× Vertex 2.5 RR 6 In 695805
- 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 51757 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 51757 |
| UPC / GTIN | 00840269915178 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 316.3 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here