6-Inch Lift Kit with M1 Shocks for 2017–2022 F-250/F-350 4WD
- Fits 2017–2022 Ford F-250 and F-350 Super Duty 4WD in XL, XLT, Lariat, King Ranch, Platinum, and Limited trim
- Excludes gas engine trucks, duallys, manual shift transfer cases, 3.5-inch rear axle tubes, factory contact overload springs, and Tremor package trucks
- Box includes two M1 monotube shock pairs, a 6-inch coil package, 4.5-inch block U-bolt kit, and a transfer case clocking kit
- Radius arm drop brackets set proper caster; fabricated anti-axle-wrap rear blocks replace cast blocks
- Downloadable installation guide available — bolt-on install
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 Does NOT fit 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 51340 is a 6-inch lift kit for 2017–2022 Ford F-250 and F-350 Super Duty 4WD trucks, XL through Limited. Two M1 monotube shock pairs, a 6-inch coil package, fabricated rear blocks with U-bolts, and a transfer case clocking kit make up the box. It does not fit gas engine trucks, duallys, manual shift transfer cases, trucks with a 3.5-inch rear axle tube, factory contact overload springs, or the Tremor package.
This 6-inch lift kit for the 2017–2022 Ford F-250/F-350 Super Duty 4WD bolts on with radius arm drop brackets that keep caster where the factory set it, so steering feel stays close to stock. Two M1 monotube shock pairs handle damping front and rear, and the anti-axle-wrap fabricated rear blocks ride on a 4.5-inch block U-bolt kit. A transfer case clocking kit is included to sort driveline angle. Check your engine, axle tube, and overload spring configuration against the exclusion list first, then work from the downloadable Rough Country installation guide.
What’s in the box
Kit contents
- 1× Kit Box 1504991
- 1× 4.5 In Block U-Bolt Kit No Overloads 1563BOX4
- 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 7673
- 1× 6 Inch Coil Box 9296
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 51340 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 51340 |
| UPC / GTIN | 00840269917684 |
| Lift height | 6 in |
| Shock package | M1 series |
| Shipping weight | 254.3 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here