6-Inch Lift Kit with N3 Shocks for Ford Super Duty 4WD (2017-2022) — Part 56021
- Fits 2017-2022 Ford Super Duty 4WD diesel models with factory rear contact overload springs
- Excludes F-350, gas engine, dually, manual-shift transfer case, 4-inch rear axle tube, and Tremor Factory Trim Package trucks
- N3 series shocks are valved for the application; fabricated anti-axle-wrap rear blocks replace the factory lift block
- Includes a front CV driveshaft and 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 ONLY fit models equipped with rear factory contact overload springs New fabricated lift block replaces the factory equipped lift block
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 N3 Shocks, fitment-checked
Rough Country 56021 is a 6-inch lift kit for the 2017-2022 Ford Super Duty 4WD, built around N3 series shocks, fabricated rear blocks, and a front CV driveshaft. Diesel models with factory rear contact overload springs only. It does not fit gas engines, dually trucks, manual-shift transfer cases, 4-inch rear axle tubes, or the Tremor factory trim package.
This 6-inch lift kit for the 2017-2022 Ford Super Duty 4WD ships as a bolt-on package: 4.5-6 inch upper and lower arm kits, a 6-inch coil box, a 6.5-inch block and U-bolt kit for the overloads, the 56020 box kit, an N3 shock kit, and a front CV driveshaft for diesel applications. Radius arm drop brackets let you set caster back where the factory intended, and the fabricated rear blocks are designed to limit axle wrap. Read the exclusion list closely before ordering, then pull the downloadable Rough Country installation guide.
What’s in the box
Kit contents
- 1× 4.5-6in Up Arm Kit 1560BOX2
- 1× 4.5-6in Lower Arms 1560BOX3
- 1× 6 Inch Coil Box 9296
- 1× 6.5 In Block U-Bolt Kitoverloads 1550BOX2
- 1× 56020 Box Kit 1560BOX1
- 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 56021 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 56021 |
| UPC / GTIN | 00843030169800 |
| Lift height | 6 in |
| Shock package | N3 series |
| Shipping weight | 301.15 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here