This kit includes 2 components, each built and powder-coated in-house.
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.
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.
Vehicle Fitment: Jeep Wrangler JL 18+ – Corrects caster, improves handling, and enhances suspension articulation for lifted and off-road setups.
CORE Advantage: Provides complete control over axle positioning, pinion angle, and caster correction, eliminating flighty steering and road rut tracking.
Adjustability: Fully adjustable for 0–6” lifts, ensuring precise alignment correction, axle re-centering, and optimized suspension geometry.
Construction: Built from heavy-duty DOM tubing with 5/16” walls, featuring 1.75” OD lowers and 1.5” OD uppers for maximum strength and performance.
Two-Stage Powder Coating: Zinc primer base and top coat available in 10 vibrant colors protect against corrosion and allow for personalized styling of your rig.
Warranty and Origin: Proudly manufactured in the United States, our product includes a lifetime warranty on all non-wear items, providing you with confidence and peace of mind in your purchase.
Built With
Front Lower Control Arm Built With 1.75” OD 5/16” Wall DOM. Welded Johnny Joint on the fixed end and a Forged Johnny Joint on the adjustable end with 1.25” x 12 TPI - 2.625” long threads.
Front Upper Control Arm Built With 1.5” OD 5/16” Wall DOM. Welded u-bracket on the welded end and a Forged Johnny Joint on the adjustable end with 1” x 14” TPI - 2.32” long threads.
| Make | Model | Submodel | Years |
|---|---|---|---|
| Jeep | Wrangler | 2018 - Present |
Each rebuild kit includes all necessary components to replace and restore wearable parts.
Construction & Materials
Front Lower control arm built with 1.75” OD 5/16” Wall DOM. Welded Johnny Joint on the fixed end and a Forged Johnny Joint on the adjustable end with 1.25” x 12 TPI - 2.625” long threads.
Front Upper control arm built with 1.5” OD 5/16” Wall DOM. Welded u-bracket on the welded end and a Forged Johnny Joints on the adjustable end with 1” x 14” TPI - 2.32” long threads.
| 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"+ |
| Placement on Vehicle | Front Upper, Front Lower, Front |
| Mounting Style | Bolt-On |
Use the vehicle selector on our website to shop by your year, make, and model. On product pages, use the kit builder to select your color, series, lift height, and any add-on options, then add to cart. If you need help, call or email our team.
Standard orders typically ship within 1–3 business days of ordering. Custom color orders take approximately 5–10 business days. Because everything is built in-house, we can turn orders quickly even for custom specifications.
You can reach our team through the contact form on our website, or browse to the Contact Us page. Our team is available to answer pre-sale and technical questions before and after your purchase.
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$ 3,727.45Specifications
| Color | Black, Blue, Charcoal, Green, LightGreen, Orange, Purple, Red, White, Yellow, Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
| Hardware | No Hardware, Complete Kit |
| Lift Size | 0" — 6", 6"+ |
| Vehicle | Jeep Wrangler JL / JLU (18–Present) |
| Brand | CORE 4X4 |
| Series | Crawl Series |
| Note to Core4x4: | - |
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