Overview
The Rubicon Express JK4443FPR is a 3.5 inch extreme duty 4-link long arm lift kit for the Jeep Wrangler JK. It has chromoly upper and lower control arms that are adjustable and use Super-Flex spherical ball joints.
The arms use Super-Ride bushings, and the kit includes a full width transmission crossmember. Installation requires no welding.
Front and rear Fox Performance Resi shocks are part of the kit. The shocks are covered by the FOX warranty and are not eligible for the Rubicon Express Advantage Warranty.
Key features
- 4-link long arm system
- Chromoly upper and lower control arms
- Adjustable control arms
- Super-Flex spherical ball joints
- Super-Ride bushings
- Front and rear Fox Performance Resi shocks
- Full width transmission crossmember
- No welding required
Coil springs and rear arms
A 4-link rear pairs the links with coil springs, so the rear keeps a stock-style spring feel in a different geometry. Coil springs usually hold up well over the life of a kit, but the rubber isolators at the spring seats can wear and should be inspected with the rest of the rear end. Link ends and frame mounts deserve a look after the first few drives, particularly where they meet the axle.
Choosing the right setup is mostly about use. A rear that sees steady trail work benefits from greasing the joints and checking the shock mounts, while a daily driver mainly needs the alignment confirmed and the bushings checked for squeak. Parts that often get replaced together during a long arm install include the bushings and the spring seat hardware.
- Grease link ends regularly on trail-driven rigs
- Inspect spring seat isolators for cracking
- Check frame mount bolts for torque after the first drive
Specifications
| Brand | Rubicon Express |
|---|---|
| Part number | JK4443FPR |
| Lift height | 3.5 inch |
| Lift height range | 2.5 to 3.5 inches |
| Suspension type | Extreme duty 4-link long arm |
| Control arm material | Chromoly |
| Ball joints | Super-Flex spherical |
| Bushings | Super-Ride |
| Shocks | Fox Performance Resi, front and rear |
| Rear lift | 4-link with coil springs |
| Crossmember | Full width transmission |
| Welding | None required |
Vehicle fitment
It fits the 2007–2018 Jeep Wrangler (JK). Check your year, model and trim against the fitment before ordering.
The JL, the Gladiator, and the TJ and LJ are not part of this fitment. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Long arm kits change axle location and driveline angles, so have both checked after the install. Trucks from 2012 onward may need an exhaust modification or a front drive shaft.
What’s included
Chromoly control arms, 4-link long arm components, Super-Flex spherical ball joints, Super-Ride bushings, a full width transmission crossmember, coil springs and front and rear Fox Performance Resi shocks.
