Overview
The Rubicon Express RE7127PM is a 3.5 inch Super-Flex suspension lift kit for the Jeep Wrangler JK. It is a progressive coil lift kit aimed at JK owners who want a more affordable option.
The lower control arms are upgraded to Super-Flex front control arms, and the stock upper control arms are kept. The kit improves trail flexibility on the JK while keeping a comfortable street ride.
The kit uses progressive coil springs at the rear and includes Monotube shocks. Its listed lift height range is 3 to 4.99 inches, and the kit is sold as a 3.5 inch lift.
Key features
- Super-Flex front control arms replace the lower control arms
- Stock upper control arms retained
- Progressive coil springs at the rear
- Monotube shocks included
- Adjustable front track bar
- Extended bump stops and sway bar disconnects
Living with a JK lift
Lifting a Wrangler JK changes the suspension angles that control steering, driveline and axle position, so the vehicle often feels different on the road after installation. Super-Flex control arms are set to hold the axle in place with more travel, but the new geometry still needs a fresh alignment. Driveline angles and pinion position should also be checked, since a change in angle can cause vibration at highway speed.
Sway bar disconnects and extended bump stops affect how the suspension handles body roll and full compression, so choose settings that match how you drive. Tire size, wheel offset and bumper weight can all change clearance under load, so review them together. Track bar adjustment is part of the alignment process, and it helps keep the axle centered under the body.
- Alignment check after installation
- Driveline angle check
- Sway bar disconnect setting
- Track bar and bump stop clearance review
Specifications
| Brand | Rubicon Express |
|---|---|
| Part number | RE7127PM |
| Lift height | 3.5 inch kit, listed range 3 to 4.99 inches |
| Front suspension | Super-Flex short arm, adjustable lower control arms |
| Rear suspension | Progressive coil springs |
| Shocks | Rubicon Express Monotube, included |
| Other parts | Adjustable front track bar, extended bump stops, sway bar disconnects |
Vehicle fitment
It is a direct fit for the 2007–2018 Jeep Wrangler (JK).
Confirm fit for your vehicle’s year, model and trim before ordering.
Installation notes
A lift kit changes suspension geometry, so have the alignment checked after installation and review the driveline angles. The sway bar disconnects should be set for the way the vehicle is driven.
What’s included
Super-Flex front control arms, progressive coil springs, Monotube shocks, an adjustable front track bar, extended bump stops and sway bar disconnects.
