2.5-Inch Lift Kit with M1 Shocks for 2018–2023 Jeep Wrangler 4WD
- Fits 2018–2023 Jeep Wrangler 4WD, 4-door only — choose Rubicon or non-Rubicon coil rate for your build
- Does not fit 3.0L EcoDiesel, 392, or 4xe models
- Kit contents: 2.5-inch coils, Vertex kit box hardware, and two M1 Monotube shock pairs
- Bolt-on install with no cutting or welding — downloadable installation guide available
- Clears up to 35-inch tires; verify control arm and sway-bar link clearance on factory wheels
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Models equipped with a 3.0L EcoDiesel V6 motor
Fits 4-door models ONLY. To ensure proper fitment please select whether your vehicle is a Rubicon or non-Rubicon using the dropdown above as coil spring rates vary between models. Due to variances in coil spring rate this kit NOT fit 392 models. Due to variances in coil spring rate this kit NOT fit 4xe models. 35" tires will clear but rubbing may occur with extreme articulation. If planning on running 35" tires on factory wheels double-check clearance between the front tire lower control arm and sway-bar links. Fitment on this page is based on the manufacturer’s application data.
About this kit
2.5-Inch Lift Kit with M1 Shocks, fitment-checked
Rough Country 66640 is a 2.5-inch lift kit for 2018–2023 Jeep Wrangler 4WD, built around Vertex-boxed hardware, matched coil springs, and two pairs of M1 Monotube shocks. It fits 4-door models only, and coil rates differ between Rubicon and non-Rubicon, so confirm which one you have before ordering.
The 2.5-inch lift kit for the 2018–2023 Jeep Wrangler 4WD covers Sport, Sport S, Sahara, Unlimited Sahara, Unlimited Rubicon, Freedom, High Tide, Willys, and Willys Sport applications listed in the fitment section — 4-door bodies only. It does not fit 3.0L EcoDiesel, 392, or 4xe models because coil rates and engine weight differ. Bolt-on assembly means no cutting or welding. Tires up to 35 inches clear, though rubbing is possible under heavy articulation; if you run 35s on factory wheels, check front tire clearance at the lower control arm and sway-bar links. A downloadable installation guide is available.
What’s in the box
Kit contents
- 1× 2.5in Coils 66630BOX1
- 1× 2.5in Vertex Kit Box 67750BOX1
- 1× M1 MONOTUBE SHOCK PAIR 770808P
- 1× M1 MONOTUBE SHOCK PAIR 770809P
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 66640 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 66640 |
| UPC / GTIN | 00840269918513 |
| Lift height | 2.5 in |
| Shock package | M1 series |
| Shipping weight | 86 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here