6-Inch Lift Kit with M1 Shocks for Ford Super Duty 4WD (2008-2010) — Part 53840
- Fits 2008-2010 Ford F-250 and F-350 Super Duty 4WD in the listed trims — 4WD only
- Does not fit dually models or gas engine models; factory rear contact overload springs must be removed
- Kit contents include M1 monotube shock pairs, 6in D-coils, add-a-leaf, 3 inch block and U-bolt kit, and two radius arm upgrade boxes
- Adjustable alignment cam at the axle allows caster adjustment after the lift
- Downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Dually models
- Gas engine models
Factory rear contact overload springs will need to be removed Fitment on this page is based on the manufacturer’s application data.
About this kit
6-Inch Lift Kit with M1 Shocks, fitment-checked
Rough Country 53840 is a 6-inch lift kit for 2008-2010 Ford F-250 and F-350 Super Duty 4WD trucks, built around two M1 monotube shock pairs, front D-coils, a rear add-a-leaf, and a 3 inch block and U-bolt kit. It does not fit dually models or gas engine models, and the factory rear contact overload springs have to come off during the install.
This 6-inch lift kit for the 2008-2010 Ford F-250/F-350 Super Duty 4WD covers XL, XLT, Lariat, King Ranch, FX4, Cabela's, and Harley-Davidson Edition trims listed in the fitment section. Two radius arm upgrade boxes carry rubber-bushed arms with an adjustable cam at the axle for caster correction, keeping the front geometry closer to factory angles. Rough Country lists the assembly as a bolt-on job. Confirm your truck is neither a dually nor a gas engine model, plan on removing the rear contact overload springs, and pull the downloadable installation PDF before you start.
What’s in the box
Kit contents
- 1× Kit Box 1538BOX1
- 1× Add-A-Leaf 6111
- 1× 3 Inch Block And U-Bolt Kit 6552
- 1× M1 MONOTUBE SHOCK PAIR 770754P
- 1× M1 MONOTUBE SHOCK PAIR 770762P
- 1× 6in D-Coil 9295
- 1× Radius Arm Upgrade Box 53600991A
- 1× Radius Arm Upgrade Box 53600992A
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 53840 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 53840 |
| UPC / GTIN | 00840269917837 |
| Lift height | 6 in |
| Shock package | M1 series |
| Shipping weight | 237 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here