6-Inch Lift Kit with N3 Shocks for Ford Super Duty 4WD (2017–2022) — Part 51720
- Fits 2017–2022 Ford F-250 and F-350 Super Duty 4WD, XL through Limited — review every exclusion below
- Diesel only; does not fit dually, manual-shift transfer case, 3.5-inch rear axle tube, or Tremor Factory Trim Package trucks
- Only for trucks with factory rear contact overload springs
- Kit contents: coil box, N3 shock kit, 6.5-inch block and U-bolt kit, universal U-bolt kit, and transfer case clocking kit
- Bolt-on installation 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
- Gas engine models
- Dually models
- Manual shift transfer cases Does NOT fit models with 3.5" rear axle tube ONLY fits models equipped with rear factory contact overload springs Does NOT work on models equipped with Tremor Factory Trim Package
About this kit
6-Inch Lift Kit with N3 Shocks, fitment-checked
Rough Country 51720 lifts 2017–2022 Ford F-250 and F-350 Super Duty 4WD trucks 6 inches, with N3 shocks, fabricated anti-axle-wrap rear blocks, and a transfer case clocking kit in the box. Diesel, single-rear-wheel trucks with factory contact overload springs only — gas, dually, manual-shift transfer case, 3.5-inch rear axle tube, and Tremor Factory Trim Package trucks are all excluded.
This 6-inch lift kit for the 2017–2022 Ford F-250 and F-350 Super Duty 4WD covers XL, XLT, Lariat, King Ranch, Platinum, and Limited trims listed in the fitment section. Radius arm drop brackets set caster back where the factory intended it, so steering feel stays close to stock, and the fabricated rear blocks are built to resist axle wrap rather than simply raise ride height. Check the exclusion list carefully before ordering — the fit is limited to diesel, single-rear-wheel trucks with factory contact overload springs. A downloadable installation guide is available.
What’s in the box
Kit contents
- 1× 6 Inch Coil Box 9296
- 1× 6.5 In Block U-Bolt Kitoverloads 1550BOX2
- 1× Kit Box 1504991
- 1× N3 Shock Kit 155030
- 1× Univ. 3 4 X 4 1 X 1 2in U-Bolt Kit 7675
- 1× Transfer Case Clocking Kit 55003
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 51720 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 51720 |
| UPC / GTIN | 00843030141066 |
| Lift height | 6 in |
| Shock package | N3 series |
| Shipping weight | 261.3 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here