4-Inch Lift Kit with M1 Struts for 2021–2026 Ford F-150 4WD
- Fits listed 2021–2026 Ford F-150 4WD submodels — review every exclusion before ordering
- Does not fit standard cab, CCD-equipped, Tremor, or 3.0L Power Stroke Turbo Diesel V6 models
- M1 monotube struts and shock pair, forged aluminum upper control arms, aluminum knuckles, rear lift blocks and hardware
- Bolt-on installation with no cutting or drilling; install time listed as 5-6 hours, downloadable installation guide available
- Running the factory wheels requires the 0.25-inch wheel spacers, SKU 1065; some 20x10 fitments note minor trimming
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Standard cab models
- Models equipped with continuous control damping (CCD) system
- Tremor models
- Models equipped with a 3.0L Power Stroke Turbo Diesel V6 engine
Retain your factory wheels by using our 0.25-inch wheel spacers SKU: 1065. Fitment on this page is based on the manufacturer’s application data.
About this kit
4-Inch Lift Kit with M1 Struts, fitment-checked
Rough Country 41840 is a 4-inch lift kit for supported 2021–2026 Ford F-150 4WD models, built around M1 monotube struts and shocks, forged aluminum upper control arms, and forged aluminum knuckles. It does not fit standard cab, CCD-equipped, Tremor, or 3.0L Power Stroke Turbo Diesel V6 trucks. Keeping the factory wheels calls for the 0.25-inch wheel spacers, SKU 1065.
This 4-inch lift kit for the 2021–2026 Ford F-150 4WD covers XL, STX, XLT, Lariat, King Ranch, Platinum, Limited, Police Responder, and SSV applications listed in the fitment section. The front side uses M1 loaded struts, forged aluminum upper control arms, and aluminum knuckles; the rear uses lift blocks with U-bolts and hardware. Rough Country lists it as a bolt-on job with no cutting or drilling and a reversible return to the stock setup. Estimated install time is 5-6 hours, and a downloadable installation guide is available. Check the tire and wheel chart for backspacing and offset combinations before ordering.
What’s in the box
Kit contents
- 1× M1 Loaded Strut Pair 502192
- 1× 4in Forged Arms & Loaded Struts Kit Box 41800992
- 1× M1 MONOTUBE SHOCK PAIR 770771P
- 1× Knuckles 41800991
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 41840 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 41840 |
| UPC / GTIN | 00840269965388 |
| Lift height | 4 in |
| Shock package | M1 series |
| Shipping weight | 171.5 lb |
| Country of origin | CN |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here