Overview
The Rubicon Express RE7123FP is a Super-Flex short arm lift kit for the Jeep Wrangler JK, with front and rear Fox Performance shocks. It is designed for both on-road and off-road driving.
The kit pairs adjustable upper control arms with fixed lower control arms. Its serviceable Super-Flex spherical ball joints and new Super-Ride bushings are the main arm components, with a listed lift height range of 2.5 to 3.5 inches.
The Fox Performance shocks are covered by the FOX warranty, and they are not eligible for the Rubicon Express Advantage Warranty.
Key features
- Short arm system
- Adjustable upper control arms
- Fixed lower control arms
- Serviceable Super-Flex spherical ball joints
- New Super-Ride bushings
- Front and rear Fox Performance shocks
Choosing shocks and springs
Short arm lifts depend on the springs and shocks working together, so their choice matters as much as the arms. Fox shocks are designed to control the heavier suspension movement that a short arm system allows, particularly on rough ground. Check that the shock lengths and mounting points match the new ride height before installation.
Coil springs should be checked for even height on both sides after installation. Uneven springs can cause a crooked stance and steering pull, so measure each corner and compare the readings. Bump stops that look compressed or cracked should be replaced at the same time.
Upper control arms with adjustment points allow alignment to be dialed in, but the settings can shift when bolts loosen. Retorque the hardware after the first drives and recheck the alignment after any change. Keep a note of settings so you can return to a known baseline.
Specifications
| Brand | Rubicon Express |
|---|---|
| Part number | RE7123FP |
| Suspension type | Super-Flex short arm |
| Lift height range | 2.5 to 3.5 inches |
| Upper control arms | Adjustable |
| Lower control arms | Fixed |
| Ball joints | Serviceable Super-Flex spherical |
| Bushings | New Super-Ride |
| Shocks | Fox Performance, front and rear |
| Rear lift | Short arm with coil springs |
| Warranty | FOX warranty on the shocks |
Vehicle fitment
It fits the 2007–2018 Jeep Wrangler (JK) and the most common JK suspension setups.
Other generations, including the JL, the Gladiator, and the older TJ and LJ, are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
A 2012 or newer truck may need an exhaust modification or a front drive shaft. Have the alignment checked after the adjustable upper arms are set.
What’s included
A short arm suspension system with adjustable upper control arms, fixed lower control arms, Super-Flex spherical ball joints, new Super-Ride bushings and front and rear Fox Performance shocks.
