Regain Proper Caster Improve Front-End Stability
When lifting your Jeep Wrangler JL, maintaining proper caster angle is crucial for steering stability, handling, and overall drivability. Factory suspension geometry is already lacking in caster, and adding a lift can worsen the issue—leading to wandering, following ruts in the road, and a loose steering feel.
Our Cruise Series Front Upper Control Arms are designed to fine-tune caster correction, improving steering precision, high-speed stability, and tire wear. When paired with our Cruise Series Front Lower Control Arms (CRS-J-JL-FL2), this combination completely restores axle centering, suspension alignment, and caster angles, offering a full front-end suspension solution for lifted Jeeps.
Key Features Benefits
- Restores proper caster angle – Adjustability allows fine-tuning of suspension geometry, eliminating wandering, pulling, and unstable steering after lifting your Jeep.
- Improves steering response high-speed stability – Proper caster helps keep your steering wheel centered and reduces fatigue from constant corrections.
- Heavy-duty steel construction – Built from high-strength steel tubing, these arms deliver long-lasting durability and enhanced off-road performance.
- Unique U-bracket design – The axle end U-bracket mounts directly to the factory axle bushing, maintaining a secure and quiet ride.
- Recommended pairing for maximum stability – Combine with our Cruise Series Front Lower Control Arms (CRS-J-JL-FL2) to fully correct caster, re-center the axle, and eliminate steering instability.
Adjustability for Lifts from 0 to 6 Inches
Whether you're at factory height or running a 6-inch lift, these fully adjustable control arms allow precise caster correction and suspension alignment. If you’re running a lift over 3 inches, pairing with our adjustable Front Lower Control Arms ensures full caster correction and axle re-centering for maximum control. For lifts beyond 6 inches, contact us for additional options.
Durable Two-Stage Powder Coating
Each control arm undergoes a two-stage powder coating process: Zinc primer base coat – Ensures maximum rust and corrosion protection, especially in harsh climates. Durable top coat – Available in 10 color options, allowing you to customize your Jeep’s suspension components while adding extra durability.
Proudly Made in the USA
Manufactured in Orem, UT, these control arms are built with 100% American-made materials to exacting quality standards. By choosing our Cruise Series, you support local manufacturing and high-quality craftsmanship.
Optional Hardware Upgrade
Our Cruise Series Front Upper Control Arms are designed to reuse your Jeep’s factory mounting hardware. If your existing bolts are rusted, worn, or difficult to remove, we offer optional Grade 8 hardware kits separately for a hassle-free installation and added durability.
For the best results, pair with our Cruise Series Front Lower Control Arms (CRS-J-JL-FL2) to create a complete front-end suspension upgrade, eliminating wandering, rut-following, and excessive steering corrections.
Upgrade today and take control of your Jeep’s handling!
Vehicle Fitment: Jeep Wrangler JL 18+ – Corrects pinion angle and improves suspension alignment, ensuring better driveline geometry after lifting.
CORE Advantage: Designed to work with adjustable lower control arms to fully restore caster and axle positioning, reducing driveline strain.
Adjustability: Single-adjustable design fine-tunes pinion angle for lifts from 0 to 6 inches, helping to reduce vibrations and drivetrain wear.
Construction: Heavy-duty steel tubing with a U-bracket axle mount and premium polyurethane bushings for durability, strength, and smooth articulation.
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 Upper control arms built with 1.5” OD 5/16” Wall DOM. Welded U-bracket on the fixed end and a Polyurethane Bushing on the adjustable end with 1” x 14 TPI - 3.25” 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 Upper control arms built with 1.5” OD 5/16” Wall DOM. Welded U-bracket on the fixed end and a Polyurethane Bushing on the adjustable end with 1” x 14 TPI - 3.25” 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 | Cruise Series |
| Hardware | No Hardware or Complete Kit |
| Placement on Vehicle | Front Upper, 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.
Reviews of Core 4x4
Accessories & Add-ons
Jeep Wrangler JL / JLU 18+ 8pc Cruise Series Adjustable Control Arm Kit
$ 976.45
Jeep Wrangler JL / JLU 18+ 2pc Cruise Series Front Lower Adjustable Control Arms
$ 288.70
Jeep Wrangler JL / JLU 18+ 4pc Cruise Series Front Adjustable Control Arm Kit
$ 524.95Specifications
| 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 |
| Vehicle | Jeep Wrangler JL / JLU (18–Present) |
| Brand | CORE 4X4 |
| Series | Cruise Series |
| Note to Core4x4: | - |
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