3.5-Inch Lift Kit with M1 Shocks for Jeep Wrangler JL (2018–2023)
- Fits 2018–2023 Jeep Wrangler JL 4WD, 4-door body only — see the full submodel list below
- Not compatible with Rubicon, 392, 4xe, or 3.0L EcoDiesel models
- Kit contents: Stage 1 arm drop kit box, 3.5-inch coils, and two M1 Monotube shock pairs
- Forged track bar, 1.25-inch outer diameter, with OEM-style rubber bushings; bolt-on, no cutting or welding
- Aftermarket front CV driveshaft strongly advised — Rough Country lists SKU 5090.1A for this application
- Downloadable installation guide available; shipping weight: 122 lb
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. Due to variances in coil spring rate this kit NOT fit Rubicon 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. An aftermarket driveshaft is HIGHLY RECOMMENDED for installation of any Jeep JL lift kit 3.5" or taller. The factory driveshaft will become damaged if the suspension reaches full droop or flex. Please use Rough Country's Jeep JL Front CV Driveshaft SKU: 5090.1A found HERE. Fitment on this page is based on the manufacturer’s application data.
About this kit
3.5-Inch Lift Kit with M1 Shocks, fitment-checked
Rough Country 66840 is a 3.5-inch lift kit for 2018–2023 Jeep Wrangler JL 4WD, built around a Stage 1 control arm drop system, matching coils, and two pairs of M1 Monotube shocks. It fits 4-door models only, and does not cover Rubicon, 392, 4xe, or 3.0L EcoDiesel builds.
This 3.5-inch lift kit for the 2018–2023 Jeep Wrangler JL 4WD ships as four boxes: the Stage 1 arm drop kit, a set of coils rated near factory spring rates, and two M1 Monotube shock pairs. Control arm drop brackets hold suspension angles where they belong, while a forged track bar with 1.25-inch outer diameter and OEM-style rubber bushings keeps the axle centered. The design bolts on with no cutting or welding. Rough Country recommends an aftermarket front CV driveshaft — SKU 5090.1A — on any JL lift of this height, since the factory shaft can be damaged at full droop.
What’s in the box
Kit contents
- 1× 3.5in Stage 1 Arm Drop Kit Box 66830BOX2
- 1× 3.5in Coils 67830BOX1
- 1× M1 MONOTUBE SHOCK PAIR 770807P
- 1× M1 MONOTUBE SHOCK PAIR 770808P
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 66840 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 66840 |
| UPC / GTIN | 00840269918520 |
| Lift height | 3.5 in |
| Shock package | M1 series |
| Shipping weight | 122 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here