Rock Krawler 2.5" Ultimate Adventure Mid-Arm Suspension System for 18-26 Jeep Wrangler JL Unlimited 4-Door
Complete Geometry Control: With eight adjustable control arms, you can perfectly set your caster and pinion angles. This is essential for preventing "death wobble" and ensuring your front and rear axles are perfectly centered under the frame for optimal tracking.
Maintenance-Free "Pro Flex" Joints: The Adventure-X arms feature service-free joints that require zero greasing. They offer up to 70∘ of misalignment, providing massive articulation off-road without the squeaks or clicking associated with traditional spherical rod ends.
Optimized for Weight: The JLU-specific triple-rate springs are designed to handle the "JK/JL Lean" and the added weight of heavy aftermarket accessories, ensuring your Jeep sits level and doesn't bottom out during aggressive maneuvers.
The Perfect 35/37 Stance: On a JLU, a 2.5" lift provides a low center of gravity (LCOG) while offering enough clearance to run 35-inch tires with factory fenders or 37-inch tires with high-clearance fenders, giving you a mean look without the stability issues of a taller lift.
"Abuse It" Warranty: Rock Krawler is famous for its "No Questions Asked" lifetime warranty on all hard parts. If you manage to bend or break a control arm or track bar on the trail, they will replace it, making this a true one-time investment for your build.
Many states have laws that limit the maximum height of a lifted vehicle. Never exceed the legal height limit.
The Rock Krawler 2.5" Ultimate Adventure Mid-Arm System for the JLU (4-Door) is widely considered the "Goldilocks" lift for Jeep owners who want a perfect balance of daily utility and serious trail performance. While the 2-door version focuses on wheelbase correction, the 4-door JLU kit is optimized to handle the extra weight and longer chassis of the Unlimited model. By replacing all eight factory control arms with adjustable Adventure-X arms, this system allows you to precisely dial in your suspension geometry, ensuring that even with larger tires, your Jeep maintains its factory-like (or better) steering feel and high-speed stability.
This system is built around Rock Krawler’s specialized Triple-Rate Coil Springs, which are specifically tuned for the 4-door’s weight distribution. These springs provide a plush, "luxury" feel over small road chatter but offer a heavy-duty, progressive rate that prevents sagging when the Jeep is loaded down with steel bumpers, a winch, or overlanding gear. Combined with a heavy-duty adjustable front track bar, this kit eliminates the lateral axle shift common with budget lifts, providing a planted, confident feel whether you are cruising at 75 mph or crawling through a rock garden.
- (4) Triple-rate Coil Springs
- (2) Front Set-length Lower Control Arms
- (2) Rear Set-length Lower Control Arms
- (2) Front Adjustable Lower Control Arms
- (2) Rear Adjustable Lower Control Arms
- (2) Front Spring Pads
- (1) Adjustable Front Track Bar
- (2) Rear Spring Pads
- (2) Set-length Rear Sway Bar Links
- (1) Bolt-on Rear Track Bar Relocation Bracket
- Shocks Included: Without Shocks or With Shocks
- Lift Height Range: 0 - 2.5 inch
Jeep Wrangler Unlimited 4-Door (JL)
- 2026 Jeep Wrangler Unlimited 4-Door (JL)
- 2025 Jeep Wrangler Unlimited 4-Door (JL)
- 2024 Jeep Wrangler Unlimited 4-Door (JL)
- 2023 Jeep Wrangler Unlimited 4-Door (JL)
- 2022 Jeep Wrangler Unlimited 4-Door (JL)
- 2021 Jeep Wrangler Unlimited 4-Door (JL)
- 2020 Jeep Wrangler Unlimited 4-Door (JL)
- 2019 Jeep Wrangler Unlimited 4-Door (JL)
- 2018 Jeep Wrangler Unlimited 4-Door (JL)
Rock Krawler 2.5" Ultimate Adventure Mid-Arm Suspension System Options
| Part Number | Catalog # | Shock Options | Engine Options | Price | |||||
|---|---|---|---|---|---|---|---|---|---|
| JL25UA-4 | 16189-4361 | without Shocks | 2.0/3.6L Engine | $2,307.03 | |||||
| JL25UA-4S1 | 16189-4363 | with RRD 2.25" IFP Shocks | 2.0/3.6L Engine | $3,568.45 | |||||
| JL25UA-392 | 16189-4424 | without Shocks | 392 6.4L Engine | $2,738.89 | |||||
| JL25UA-392S1 | 16189-4426 | with RRD 2.25" IFP Shocks | 392 6.4L Engine | $4,000.31 | |||||
| JL25UA-4D | 16189-4403 | without Shocks | 3.0L Diesel Engine | $2,354.53 | |||||
| JL25UA-4DS1 | 16189-4405 | with RRD 2.25" IFP Shocks | 3.0L Diesel Engine | $3,615.95 | |||||
| JL25UA-4XE | 16189-4379 | without Shocks | 4Xe Engine | $2,354.53 | |||||
| JL25UA-4XES1 | 16189-4381 | with RRD 2.25" IFP Shocks | 4Xe Engine | $3,615.95 |
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