6-Inch Lift Kit with M1 Shocks for Ford Super Duty 4WD (2005–2007) — Part 53640
- Fits 2005–2007 Ford F-250 and F-350 Super Duty 4WD — XL through Harley-Davidson Edition
- Does not fit dually models or gas engine models
- Factory rear contact overload springs must be removed during installation
- Kit includes two M1 monotube shock pairs, front coils, radius arm upgrade boxes, add-a-leaf, and a 3 inch block and U-bolt kit
- Bolt-on installation; 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 53640 is a 6-inch lift kit for the 2005–2007 Ford F-250 and F-350 Super Duty 4WD, built around M1 monotube shock pairs, front coils, upgraded radius arms, and a rear add-a-leaf with 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 come out during the build.
The 6-inch lift kit for the 2005–2007 Ford F-250/F-350 Super Duty 4WD covers XL, XLT, Lariat, King Ranch, and Harley-Davidson Edition trims in 4WD form. Two M1 monotube shock pairs handle damping front and rear, while the heavy-duty radius arms carry rubber bushings and an adjustable cam at the axle so caster can be set back toward factory angles. Rear height comes from an add-a-leaf paired with a fabricated block and U-bolt kit. Confirm your truck is neither dually nor gas-powered, then work through the downloadable Rough Country installation guide before starting.
What’s in the box
Kit contents
- 1× Kit Box 1536BOX2
- 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 53640 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 53640 |
| UPC / GTIN | 00840269917813 |
| Lift height | 6 in |
| Shock package | M1 series |
| Shipping weight | 239 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here