4-Inch Lift Kit with N3 Shocks for 2015–2020 Ford F-150 4WD — Part 55531
- Fits 2015–2020 Ford F-150 4WD in the submodels shown in the fitment table
- Does not fit regular or standard cab models
- Clears 18-inch or larger factory wheels; with factory wheels retained, keep tires 11.5 inches wide or narrower
- Kit contents: loaded 4-inch strut pair, N3 shock pair, fabricated rear blocks and U-bolts, knuckles, crossmember
- 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 N3 Shocks, fitment-checked
Rough Country 55531 is a 4-inch lift kit for 2015–2020 Ford F-150 4WD models, built around a loaded 4-inch strut pair, an N3 shock pair, fabricated rear blocks with U-bolts, knuckles, and a crossmember. Cutting and drilling are part of the job, and it does not fit regular or standard cab trucks. Trucks keeping the factory wheels should stay at or under an 11.5-inch-wide tire.
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, and it keeps the factory track width rather than pushing the wheels outward. The box holds a loaded strut pair matched to the 4-inch height, an N3 shock pair for the rear, welded steel rear blocks with U-bolts, replacement knuckles, and a crossmember. Plan on cutting and drilling during installation, and confirm your cab configuration first — regular and standard cab trucks are excluded. The downloadable Rough Country installation guide is available for a full walkthrough 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× Loaded Strut Pair 501051C
- 1× N3 Shock Pair 23165
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 55531 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 55531 |
| UPC / GTIN | 00843030161316 |
| Lift height | 4 in |
| Shock package | N3 series |
| Shipping weight | 236 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here