Rock Krawler 3.5" Ultimate Adventure Mid-Arm Suspension System for 18-26 Jeep Wrangler JL Unlimited 4-Door
Optimal 37" to 38" Tire Clearance: The 3.5" lift height is the "sweet spot" for running 37-inch tires with full articulation or moving up to 38-inch tires with high-clearance fenders, providing the belly height needed for technical rock crawling.
Zero-Maintenance "Pro Flex" Joints: The Adventure-X control arms feature service-free joints that require no greasing or rebuilding. They offer a massive 70∘ of misalignment, allowing for silent, bind-free articulation that outperforms standard rubber or poly bushings.
Total Geometry Correction: With eight adjustable arms and a heavy-duty front track bar, you can perfectly center your axles and dial in your caster. This is critical at 3.5" of lift to prevent "flighty" steering and ensure proper driveshaft alignment.
Advanced Roll Center Stability: The kit includes a heavy-duty front track bar and rear track bar relocation brackets to correct the roll center. This keeps the JLU planted and reduces body roll during cornering, which is vital for a taller, heavier vehicle.
Legendary "Abuse It" Warranty: Like all Rock Krawler hard parts, this system is backed by a lifetime warranty. Whether you're daily driving or bashing through the Hammers, you have the peace of mind that your suspension components are built to be indestructible.
Many states have laws that limit the maximum height of a lifted vehicle. Never exceed the legal height limit.
The Rock Krawler 3.5" Ultimate Adventure Mid-Arm System for the JL Unlimited (4-Door) is the "heavy-hitter" setup for owners who want a formidable trail presence without jumping into the complexity of a long-arm conversion. At 3.5 inches of lift, the JLU gains a massive boost in ground clearance, which is essential for the 4-door’s longer wheelbase to avoid high-centering on obstacles. This kit is a complete geometry correction solution, providing all eight adjustable Adventure-X control arms to reset your caster and pinion angles. This ensures that even with the increased height and larger rotating mass of heavy tires, the Jeep maintains a stable, confident "on-rails" feel at highway speeds.
Engineered to handle the weight of a fully outfitted rig, this system utilizes Rock Krawler’s signature Triple-Rate Coil Springs. These springs are specifically tuned for the 4-door chassis, offering a plush initial stroke for road comfort while providing a progressive rate that handles heavy bumpers, winches, and rooftop tents without sagging. By replacing the weak factory arms with high-clearance, solid steel components and a heavy-duty adjustable front track bar, you’re not just lifting the Jeep—you’re significantly reinforcing the entire drivetrain architecture for years of hard use.
- (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: 3 - 4.5 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 3.5" Ultimate Adventure Mid-Arm Suspension System Options
| Part Number | Catalog # | Shock Options | Engine Options | Price | |||||
|---|---|---|---|---|---|---|---|---|---|
| JL35UA-4 | 16189-4439 | without Shocks | 2.0/3.6L Engine | $2,307.03 | |||||
| JL35UA-4S1 | 16189-4441 | with RRD 2.25" IFP Shocks | 2.0/3.6L Engine | $3,463.95 | |||||
| JL35UA-392 | 16189-4535 | without Shocks | 392 6.4L Engine | $2,738.89 | |||||
| JL35UA-392S1 | 16189-4537 | with RRD 2.25" IFP Shocks | 392 6.4L Engine | $3,895.81 | |||||
| JL35UA-4D | 16189-4500 | without Shocks | 3.0L Diesel Engine | $2,354.53 | |||||
| JL35UA-4DS1 | 16189-4502 | with RRD 2.25" IFP Shocks | 3.0L Diesel Engine | $3,511.45 | |||||
| JL35UA-4XE | 16189-4461 | without Shocks | 4Xe Engine | $2,354.53 | |||||
| JL35UA-4XES1 | 16189-4463 | with RRD 2.25" IFP Shocks | 4Xe Engine | $3,511.45 |
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