6-Inch Lift Kit with N3 Shocks for Ford Super Duty 4WD (2017-2022) — Part 50421
- Fits 2017-2022 Ford F-250 and F-350 Super Duty 4WD in XL through Limited trims — review the full exclusion list first
- Kit contents: 6-inch coil box, 4.5-inch block and U-bolt kit (no overloads), front diesel CV drive shaft, N3 shock kit
- Excludes dually, gas engine, manual shift transfer case, 4-inch rear axle tube, factory contact overload spring, and Tremor trucks
- Radius arm drop brackets set caster; fabricated rear blocks are designed to resist axle wrap
- Bolt-on installation — downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Dually models
- Manual shift transfer cases Does NOT fit gas engine models
- Models with 4" rear axle tube Does NOT fit models equipped with rear factory contact overload springs Does NOT work on models equipped with Tremor Factory Trim Package
Does NOT F-350 models. Fitment on this page is based on the manufacturer’s application data.
About this kit
6-Inch Lift Kit with N3 Shocks, fitment-checked
Rough Country 50421 is a 6-inch lift kit for 2017-2022 Ford F-250 and F-350 Super Duty 4WD models, built around a coil package, fabricated 4.5-inch rear blocks with U-bolts, a front CV drive shaft, and N3 series shocks. Diesel-only application: gas engine, dually, manual shift transfer case, and Tremor package trucks are excluded.
This 6-inch lift kit for the 2017-2022 Ford Super Duty 4WD covers XL, XLT, Lariat, King Ranch, Platinum, and Limited trims on the F-250 and F-350 as listed in the fitment section. The kit ships with a 6-inch coil box, a 4.5-inch block and U-bolt set without overloads, a front diesel CV drive shaft, and an N3 shock kit. Radius arm drop brackets are used to set caster. Before ordering, confirm your truck is not a dually, gas engine, manual shift transfer case, 4-inch rear axle tube, factory contact overload spring, or Tremor build. A downloadable installation guide is available.
What’s in the box
Kit contents
- 1× 6 Inch Coil Box 9296
- 1× 4.5 In Block U-Bolt Kit No Overloads 1563BOX4
- 1× Kit Box 1504991
- 1× N3 Shock Kit 155030
- 1× CV Drive Shaft 5068.1
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 50421 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 50421 |
| UPC / GTIN | 00843030169787 |
| Lift height | 6 in |
| Shock package | N3 series |
| Shipping weight | 230.13 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here