4-Inch Lift Kit with M1 Shocks for 2015–2020 Ford F-150 4WD
- Fits listed 2015–2020 Ford F-150 4WD submodels — regular and standard cab models are not covered
- Kit contents: block and U-bolt kit, crossmember, knuckles, M1 loaded strut pair, M1 monotube shock pair
- Works with 18-inch or larger factory wheels; keep tires no wider than 11.5 inches on stock wheels
- Cutting and drilling required — downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Regular or standard cab models
Requires cutting and drilling. Models retaining factory wheels are advised to run no wider than a 11.5" wide tire. Fitment on this page is based on the manufacturer’s application data.
About this kit
4-Inch Lift Kit with M1 Shocks, fitment-checked
Rough Country 55540 is a 4-inch lift kit for supported 2015–2020 Ford F-150 4WD models, built around an M1 loaded strut pair and an M1 monotube shock pair. Installation calls for cutting and drilling. Regular and standard cab models are not covered. If you keep the factory wheels, Rough Country advises staying at or under a tire 11.5 inches wide.
This 4-inch lift kit for the 2015–2020 Ford F-150 4WD covers XL, XLT, Lariat, King Ranch, Platinum, Limited, and SSV applications listed in the fitment section. The boxed kit brings a block and U-bolt package, crossmember, knuckles, the M1 loaded struts, and the M1 monotube shock pair, so front and rear are addressed in one order. Factory track width is retained and 18-inch or larger factory wheels work. Plan on cutting and drilling, confirm your cab configuration first, and pull the downloadable Rough Country installation guide before you start.
What’s in the box
Kit contents
- 1× 4 Inch Block & U-Bolt Kit 555BOX1
- 1× Kit Box 557BOX2
- 1× RC Crossmember Box 1555BOX4
- 1× Knuckles 1553BOX6
- 1× M1 Loaded Strut Pair 502051C
- 1× M1 MONOTUBE SHOCK PAIR 770751P
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 55540 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 55540 |
| UPC / GTIN | 00840269941542 |
| Lift height | 4 in |
| Shock package | M1 series |
| Shipping weight | 227 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here