4-Inch Lift Kit with M1 Shocks for 1997–2006 Jeep Wrangler 4WD
- Fits 1997–2006 Jeep Wrangler 4WD, including Rubicon and Unlimited applications listed in the fitment table
- M1 monotube shocks — two pairs supplied, front and rear
- Adjustable forged front track bar covering the 4-6 inch lift range, plus front coil springs
- Transfer case drop or slip yoke eliminator with CV driveshaft recommended; Rubicon models need only the CV driveshaft
- Downloadable installation guide available
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✓ Fits
Transfer case drop kit or Slip Yoke Eliminator with CV Drive Shaft is recommended to avoid driveline vibration. View CV Drive Shafts here. Rubicon models do NOT need a SYE kit or transfer case drop but a CV Drive Shaft is still recommended. 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 66140 is a 4-inch lift kit for the 1997–2006 Jeep Wrangler 4WD, built around forged front track bar, front coils, and two M1 monotube shock pairs. Rough Country recommends a transfer case drop or a slip yoke eliminator with a CV driveshaft to keep driveline vibration in check; Rubicon models can skip those but a CV driveshaft is still advised.
This 4-inch lift kit for the 1997–2006 Jeep Wrangler 4WD covers SE, Sport, X, Sahara, Rubicon, Unlimited, Unlimited Rubicon, and the 65th Anniversary Edition as shown in the fitment section. The box holds an adjustable forged front track bar rated for a 4-6 inch lift range, front coil springs, and two pairs of M1 monotube shocks. Plan the driveline side of the job before you start: a transfer case drop or slip yoke eliminator with CV driveshaft is the recommended pairing. A downloadable Rough Country installation guide is available for the full sequence.
What’s in the box
Kit contents
- 1× Track Bar 1052
- 1× 4in Coils 1661C
- 1× 1661x Kit Box 1661XBOX3
- 1× Kit Box 1661XBOX4
- 1× M1 MONOTUBE SHOCK PAIR 770743P
- 1× M1 MONOTUBE SHOCK PAIR 770746P
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 66140 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 66140 |
| UPC / GTIN | 00840269918506 |
| Lift height | 4 in |
| Shock package | M1 series |
| Shipping weight | 172 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
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