Unmatched Flexibility and Durability
Upgrade your Jeep Wrangler JK’s suspension system with the Crawl Series Rear Control Arms Set (CRL-J-JK-RS4). Designed for superior off-road performance and reliable on-road handling, this set includes two upper (CRL-J-JK-RU2) and two lower (CRL-J-JK-RL2) control arms. Engineered for strength, flexibility, and durability, this set delivers the ultimate suspension upgrade for Jeep enthusiasts who demand the best.
What's Included in the Kit
- Crawl Series Rear Upper Control Arms (CRL-J-JK-RU2)
- Crawl Series Rear Lower Control Arms (CRL-J-JK-RL2)
Key Features and Benefits
- Heavy-Duty Construction – The upper control arms are built from 1.5” OD x 5/16” DOM Tubing, while the lower control arms feature massive 1.75” OD x 5/16” DOM Tubing. These materials ensure exceptional strength and durability, outperforming stock and aftermarket alternatives.
- Johnny Joints for Maximum Articulation – All control arms are equipped with original Johnny Joints at both ends, delivering extreme off-road flexibility and superior ride quality on-road.
- Adjustability for Lifted Jeeps – Fully adjustable to accommodate suspension lifts from 0 to 6 inches, enabling precise alignment, axle centering, and suspension geometry optimization. For lifts beyond 6 inches, custom options are available upon request.
- Complete Suspension Harmony – Designed to work seamlessly as part of the Crawl Series system, these control arms integrate flawlessly with other Crawl Series components, creating a cohesive suspension setup that enhances overall performance and drivability both on and off the trail.
Two-Stage Powder Coating
Every control arm is treated with a durable two-stage powder coating process for enhanced resistance to rust and corrosion. The zinc primer base ensures a strong protective layer, while the topcoat, available in a range of 10 colors, adds durability and customization options for your Jeep.
Made in the USA
The Crawl Series Rear Control Arms Set is proudly designed and manufactured in the USA. By choosing this product, you’re supporting American craftsmanship and investing in premium quality components that stand the test of time.
Optional Hardware Upgrade
- Installation is straightforward using your Jeep’s factory hardware.
- For vehicles with rusted or stubborn bolts, optional Grade 8 hardware kits are available to ensure a smooth installation process.
In Conclusion
Choose the Crawl Series Rear Control Arms Set (CRL-J-JK-RS4) to elevate your Jeep Wrangler JK’s suspension performance. With heavy-duty construction, premium Johnny Joints, and full adjustability, this set delivers unmatched off-road flexibility and reliable on-road handling. Designed for Jeep enthusiasts who demand the best, this set offers durability, precision, and American-made quality. Upgrade your suspension system today and conquer any terrain with confidence.
Ideal use:
Crawl Series is for aggressive rock crawling and hard use. Maximum strength and articulation for serious off-road enthusiasts.
Not sure which series fits your needs? Contact us for guidance.
- Alignment recommended after install.
- Install difficulty: moderate. Basic mechanical skills recommended.
- Estimated install time: 4–8 hours depending on experience.
- Some trimming may be required on factory axle mounts (front track bar). See our YouTube channel for guidance.
- Install videos and support available. Check product Description for links.
- Designed to reuse factory hardware. Upgrade available if yours is worn or missing.
| Make | Model | Submodel | Years |
|---|---|---|---|
| Jeep | Wrangler | 2007 - 2018 |
Each rebuild kit includes all necessary components to replace and restore wearable parts.
| Vehicle | Jeep Wrangler JK / JKU (07–18) |
| Brand | CORE 4X4 |
| Color | Black or Blue or Charcoal or Green or LightGreen or Orange or Purple or Red or White or Yellow or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
| Series | Crawl Series |
| Hardware | No Hardware or Complete Kit |
| Lift Size | 0" — 6" or 6"+ |
See It Installed
Install videos and build guides on our YouTube channel.
Watch more installs on YouTube
Reviews from Google
Not Sure Which Tier? Compare All Three.
Same American steel. Same warranty. Same quality. Choose by how you use your vehicle.
| CRUISE | CAMP | CRAWL VIEWING | |
|---|---|---|---|
| Tagline | "Daily Confidence" | "Weekend Ready" | "Trail Domination" |
| Joint Type | Polyurethane Bushings | Johnny Joint (Single) | Double Johnny Joint |
| Articulation | ~30% | ~65% | ~95% |
| Tubing | 1.625" OD / 3/16" Wall DOM | 1.75" OD / 5/16" Wall DOM | 1.75" OD / 5/16" Wall DOM |
| Price | $402 | $605 | $853 |
| Maintenance | Zero | Periodic grease | Periodic grease |
| Best For | Daily driver, light trails | Weekend warrior, moderate off-road | Hardcore builder, competition |
| Warranty | Lifetime ✓ | Lifetime ✓ | Lifetime ✓ |
Why Builders Choose Core 4x4
The only aftermarket suspension brand with a tiered product system
vs. MetalCloak
One price point, no tier options. Core 4x4 Crawl matches their performance at a better price with a better warranty.
vs. Teraflex
Skip a grease interval? Warranty voided. Core 4x4 Cruise requires zero maintenance — and our warranty covers everything.
vs. Clayton / Budget
Cheaper arms exist. But adjustable, American-made, 10 colors, lifetime guarantee, and an upgrade path? Only Core 4x4.
Suggested Products
Accessories & Add-ons
Jeep Wrangler JK / JKU 07-18 8pc Crawl Series Adjustable Control Arm Kit
$ 1,574.95
Jeep Wrangler JK / JKU 07-18 10pc Crawl Series Adjustable Control Arm, Track Bar Kit
$ 1,994.95
Jeep Wrangler JK / JKU 07-18 12pc Crawl Series Adjustable Control Arm, Track Bar, Steering Kit
$ 3,097.45
Jeep Wrangler JK / JKU 07-18 16pc Crawl Series Adjustable Control Arm, Track Bar, Steering, End Link Kit
$ 3,622.45
Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Rear Lower Adjustable Control Arms
$ 482.95
Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Rear Upper Adjustable Control Arms
$ 461.95
