The Ultimate Front-End Solution for Superior Handling and Flexibility
Transform your Jeep Wrangler JL’s suspension system with the Crawl Series Front Control Arms Set (CRL-J-JL-FS4). Designed to address factory caster deficiencies and improve overall alignment, this set includes both front lower and upper control arms for a comprehensive solution. Whether tackling rugged trails or navigating city streets, this set eliminates common issues like flighty steering and road rut tracking while enhancing off-road flexibility and on-road stability. Ideal for lifts from 0 to 6 inches, it is the essential front-end upgrade for Jeep JL enthusiasts.
What's Included in the Kit
- Crawl Series Front Upper Control Arms (CRL-J-JL-FU2)
- Crawl Series Front Lower Control Arms (CRL-J-JL-FL2)
Key Features and Benefits
- Fixes Factory Caster Deficiency – Specifically engineered to correct the lack of caster in Jeep JL models, this set improves drivability by reducing flighty steering, following ruts in the road, and instability caused by lifts from 0 to 3 inches.
- Heavy-Duty Construction for Extreme Durability – Lower control arms are constructed with 1.75” OD DOM Tubing, while upper control arms use 1.5” OD DOM Tubing, both with a 5/16” wall thickness. This ensures unmatched strength and reliability for demanding off-road use.
- Johnny Joints for Maximum Articulation – Equipped with premium Rock Jock Johnny Joints at both ends of the lowers and at the adjustable end of the uppers, these control arms deliver exceptional flexibility and smooth operation in extreme conditions.
- Optimized for Larger Lifts – Fully adjustable to accommodate lift heights up to 6 inches, this set re-centers your axle and corrects alignment. For lifts over 3 inches, the combination of upper and lower control arms ensures proper suspension geometry for peak performance.
Two-Stage Powder Coating
Each control arm undergoes a rigorous two-stage powder coating process. A zinc primer base coat provides exceptional rust resistance, while the topcoat—available in 10 customizable colors—offers added durability and a personalized finish to match your Jeep’s look.
Made in the USA
Proudly designed and manufactured in Orem, UT, the Crawl Series Front Control Arms Set reflects CORE 4X4’s dedication to American craftsmanship. By managing the production process in-house, we deliver top-tier quality while supporting local industries.
Optional Hardware Upgrade
The Crawl Series Front Control Arms Set is designed for straightforward installation using factory hardware. Optional Grade 8 hardware kits are available for those dealing with rusted or stubborn bolts, ensuring a hassle-free upgrade experience.
In Conclusion
Upgrade your Jeep Wrangler JL with the Crawl Series Front Control Arms Set (CRL-J-JL-FS4) for a complete front-end solution. Correct factory caster issues, improve handling, and enhance off-road articulation with this premium set. Designed for Jeep enthusiasts who demand the best, this set combines superior strength, adjustability, and durability to elevate your vehicle’s performance on and off the trail. Experience the difference in drivability and control today with CORE 4X4.
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 | 2018 - Present |
Each rebuild kit includes all necessary components to replace and restore wearable parts.
| Vehicle | Jeep Wrangler JL / JLU (18–Present) |
| 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 | $446 | $605 | $728 |
| 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 12pc Camp Series Adjustable Control Arm, Track Bar, Steering Kit
$ 2,729.95
Jeep Wrangler JL / JLU 18+ 8pc Crawl Series Adjustable Control Arm Kit
$ 1,585.45
Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Front Lower Adjustable Control Arms
$ 503.95
Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Front Upper Adjustable Control Arms
$ 314.95
Jeep Wrangler JL / JLU 18+ 10pc Crawl Series Adjustable Control Arm, Track Bar Kit
$ 2,047.45
Jeep Wrangler JL / JLU 18+ 16pc Crawl Series Adjustable Control Arm, Track Bar, Steering, End Link Kit
$ 3,727.45
