6-Inch Lift Kit with M1 Shocks for 2005-2007 Ford F-250/F-350 4WD
- Fits 2005-2007 Ford F-250 and F-350 Super Duty 4WD, gas-engine single-rear-wheel trucks
- Not for diesel engines, dually axles, or trucks equipped with rear overload springs
- Exhaust modification required for front driveshaft clearance
- Kit contents include upper and lower arm boxes, 6 inch front coils, add-a-leaf, 3 inch rear blocks with U-bolts, and two M1 monotube shock pairs
- Bolt-on install with a downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Diesel engine models
- Dually models
Does NOT models with rear overload springs. Requires exhaust modification to clear the front driveshaft. 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 57840 is a 6-inch lift kit for 2005-2007 Ford F-250 and F-350 Super Duty 4WD trucks, built around upper and lower radius arm hardware, front coils, an add-a-leaf, a 3 inch rear block and U-bolt set, and two pairs of M1 monotube shocks. It does not fit diesel-engine trucks, dually trucks, or trucks with rear overload springs, and the exhaust must be modified for front driveshaft clearance.
This 6-inch lift kit for the 2005-2007 Ford F-250/F-350 4WD covers XL, XLT, Lariat, King Ranch, and Harley-Davidson Edition trims listed in the fitment section. Radius arm drop brackets let you reset caster so steering feel stays close to factory, and the front lift height brings the nose up level with the rear. Work is bolt-on, though the exhaust needs modification to clear the front driveshaft. Confirm your engine, rear spring setup, and wheel configuration against the exclusions first, then follow the downloadable Rough Country installation guide.
What’s in the box
Kit contents
- 1× 6in Up Arm Kit 1580 BOX 1
- 1× 6in Lower Arms 1580 BOX 2
- 1× Kit Box 1580 BOX 3
- 1× Add-A-Leaf 6111
- 1× 3 Inch Block & U-Bolt Kit 6539
- 1× M1 MONOTUBE SHOCK PAIR 770754P
- 1× M1 MONOTUBE SHOCK PAIR 770762P
- 1× 6 Inch Coil Box 9296
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 57840 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 57840 |
| UPC / GTIN | 00840269918148 |
| Lift height | 6 in |
| Shock package | M1 series |
| Shipping weight | 257 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here