4.5-Inch Lift Kit with N3 Shocks for 2017–2022 Ford Super Duty 4WD — Part 55021
- Fits listed 2017–2022 Ford F-250 Super Duty 4WD diesel trims — check every exclusion before ordering
- Does not fit F-350, gas engine, dually, manual shift transfer case, or Tremor Factory Trim Package models
- Also excludes trucks with a 4-inch rear axle tube and 2020 models with the 10-speed transmission
- Kit contents: 5-inch-rate front coil, N3 shock kit, 4.5-inch block and U-bolt kit, front CV drive shaft
- Bolt-on install with radius arm drop brackets for correct caster — downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- F-350 models
- Gas engine models
- Manual shift transfer cases Does NOT fit dually models
- Models with 4" rear axle tube Does NOT work on models equipped with Tremor Factory Trim Package Does NOT fit 2020 models with 10-speed transmission
About this kit
4.5-Inch Lift Kit with N3 Shocks, fitment-checked
Rough Country 55021 is a 4.5-inch lift kit for 2017–2022 Ford Super Duty 4WD, built around N3 series shocks, a 5-inch-rate front coil, fabricated blocks with U-bolts, and a front CV drive shaft. Diesel models only — it does not fit F-350, gas engine, dually, manual shift transfer case, or Tremor Factory Trim Package trucks, models with a 4-inch rear axle tube, or 2020 trucks with the 10-speed transmission.
This 4.5-inch lift kit for the 2017–2022 Ford Super Duty 4WD covers XL, XLT, Lariat, King Ranch, Platinum, and Limited trims listed in the fitment section, and installs as a bolt-on job. Radius arm drop brackets set caster back where the factory intended it, application-valved N3 shocks handle damping on road and off, and fabricated rear blocks pair with the supplied U-bolts. Read the exclusion list closely first — engine, axle, transfer case, and transmission qualifiers all apply — then work from the downloadable Rough Country installation guide.
What’s in the box
Kit contents
- 1× Coil 5d 9297
- 1× N3 Shock Kit 155030
- 1× Kit Box 1550BOX1
- 1× Block U-Bolt 4.5in Kit 1550BOX3
- 1× CV Drive Shaft 5068.1
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 55021 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 55021 |
| UPC / GTIN | 00843030169923 |
| Lift height | 4.5 in |
| Shock package | N3 series |
| Shipping weight | 219.38 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here