4-Inch Lift Kit with N3 Shocks for 2021–2026 Ford F-150 Tremor 4WD
- Fits 2021–2026 Ford F-150 4WD Tremor models only — no other F-150 configuration
- Wheel diameter must be 20 inches or larger
- Kit contents: front strut box, rear kit boxes, RC crossmember, forged aluminum knuckles, N3 shock pair
- Aluminum knuckles weigh about half what steel knuckles do, reducing unsprung mass
- Front ride height comes up level with the rear; track width stays at factory spec
- Downloadable installation guide available. Shipping weight: 162 lb
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Will it fit your truck?
✓ Fits
Fits F-150 Tremor models ONLY. Wheels must be 20" in diameter or larger. 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 40730 is a 4-inch lift kit for the 2021–2026 Ford F-150 Tremor 4WD. The kit pairs forged aluminum knuckles and a crossmember with front struts, rear components, and an N3 shock pair. It fits Tremor models only, and your wheels need to measure 20 inches or larger in diameter.
This 4-inch lift kit for the 2021–2026 Ford F-150 Tremor 4WD ships as a multi-box package: front strut and rear kit boxes, a Rough Country crossmember, forged aluminum knuckles, and an N3 shock pair. The aluminum knuckles cut roughly half the weight of comparable steel units, which trims unsprung mass, and the design keeps track width at the factory measurement. The added height raises ground clearance and brings the front up level with the rear. Confirm your truck is a Tremor and your wheels are 20 inches or larger before ordering, then work from the downloadable Rough Country installation guide.
What’s in the box
Kit contents
- 1× 4in RR Kit Box 40730BOX3
- 1× Kit Box 40730BOX5
- 1× 4in Strut Box 555BOX3
- 1× RC Crossmember Box 40730BOX1
- 1× Aluminum Knuckles 49930992
- 1× N3 Shock Pair 23165
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 40730 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 40730 |
| UPC / GTIN | 00840269903151 |
| Lift height | 4 in |
| Shock package | N3 series |
| Shipping weight | 162 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here