6-Inch Lift Kit with M1 Shocks for 2017–2022 Ford Super Duty 4WD
- Fits 2017–2022 Ford F-250 and F-350 Super Duty 4WD — review the full exclusion list before ordering
- Excludes gas engine, dually, manual-shift transfer case, 3.5-inch rear axle tube, and Tremor Factory Trim Package trucks
- Only for trucks with rear factory contact overload springs
- Kit contents: two M1 monotube shock pairs, 6-inch coil package, 6.5-inch block and U-bolt kit, transfer case clocking kit
- Fabricated anti-axle-wrap rear blocks and radius arm drop brackets for caster correction
- Bolt-on installation; downloadable installation guide available. Shipping weight: 261.3 lb
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 M1 Shocks, fitment-checked
Rough Country 51740 is a 6-inch lift kit for 2017–2022 Ford F-250 and F-350 Super Duty 4WD models, built around two M1 monotube shock pairs, a 6-inch coil package, and a 6.5-inch block and U-bolt set. It does not fit gas engine models, dually models, manual-shift transfer cases, 3.5-inch rear axle tubes, or the Tremor factory trim package, and it requires factory contact overload springs at the rear.
This 6-inch lift kit for the 2017–2022 Ford Super Duty 4WD covers F-250 and F-350 trims from XL through Limited, including King Ranch, Lariat, Platinum, and XLT. The box ships with M1 monotube shock pairs front and rear, a coil package, fabricated anti-axle-wrap rear blocks with U-bolts, and a transfer case clocking kit. Radius arm drop brackets keep caster set where the factory geometry wants it. Confirm your truck runs a diesel engine, an electronic-shift transfer case, and rear factory contact overload springs before ordering. A downloadable installation guide is available.
What’s in the box
Kit contents
- 1× Kit Box 1504991
- 1× 6.5 In Block U-Bolt Kitoverloads 1550BOX2
- 1× Transfer Case Clocking Kit 55003
- 1× M1 MONOTUBE SHOCK PAIR 770754P
- 1× M1 MONOTUBE SHOCK PAIR 770805P
- 1× Univ. 3 4 X 4 1 X 1 2in U-Bolt Kit 7675
- 1× 6 Inch Coil Box 9296
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 51740 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 51740 |
| UPC / GTIN | 00840269917707 |
| Lift height | 6 in |
| Shock package | M1 series |
| Shipping weight | 261.3 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here