6-Inch Lift Kit with M1 Shocks for 1999-2004 Ford Super Duty 4WD
- Fits 1999-2004 Ford F-250 and F-350 Super Duty 4WD in the trims listed in the fitment section
- M1 monotube shocks: two pairs valved for this application, front and rear
- Kit contents: 6-inch front leaf springs, 4-inch rear lift block pair, pitman arm, two universal U-bolt kits, hardware box kit
- Excludes V-8 gas engine trucks, dually models, and production dates before 3-1-1999
- 2-piece rear driveshaft trucks need a carrier bearing drop bracket, not part of this kit
- Bolt-on install with a downloadable installation guide available; shipping weight: 250 lb
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- V-8 gas engine models
- Dually models
- Models with a production date before 3-1-1999 A carrier bearing drop bracket is needed for trucks equipped with a 2-piece rear driveshaft
(#1197) 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 49640 lifts the 1999-2004 Ford Super Duty 4WD 6 inches on M1 monotube shocks, with two shock pairs valved for this application. It does not fit V-8 gas engine trucks, dually models, or trucks built before 3-1-1999.
M1 monotube shocks set this 6-inch lift kit for the 1999-2004 Ford Super Duty 4WD apart: two application-valved pairs ship alongside a pair of 6-inch front leaf springs, a 4-inch rear lift block pair, two universal U-bolt kits, a pitman arm, and a hardware box kit. Fitment covers F-250 and F-350 4WD trucks in the XL, XLT, Lariat, King Ranch, and Harley-Davidson Edition trims listed below. Gas V-8 trucks, dually axles, and pre-3-1-1999 production dates are out. A 2-piece rear driveshaft calls for a carrier bearing drop bracket, and the bolt-on install has a downloadable Rough Country guide available.
What’s in the box
Kit contents
- 1× Lift Block Kit 6593
- 1× Pitman Arm 6611
- 1× Box Kit 7582
- 1× M1 MONOTUBE SHOCK PAIR 770762P
- 1× M1 MONOTUBE SHOCK PAIR 770791P
- 1× Universal U-Bolt Kit 7638
- 1× UNIVERSAL U-BOLT KIT 7653
- 2× 6in FR Leaf Spr 8061V
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 49640 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 49640 |
| UPC / GTIN | 00840269917530 |
| Lift height | 6 in |
| Shock package | M1 series |
| Shipping weight | 250 lb |
| Country of origin | IN |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here