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CORE 4X4 · Suspension SKU: CRL-J-JK-RU2

Jeep Wrangler JK / JKU 2pc Kit

Adjustable control arms — rear upper · fits 0–6″+ lift

Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Rear Upper Adjustable Control Arms

The same CRAWL SERIES kit is made for the Bronco: Ford Bronco 21+ 2pc Crawl Series Rear Upper Adjustable Control Arms · $443

$406.52 $461.95 Save $55

CRUISE from $222 · CAMP $296

$ 406.52 406.52 USD $ 461.95

$ 461.95

Save $ 55.43

Built to order, usually ships in 1–3 days.
Enter ZIP for arrival estimate Delivery date by ZIP
Order by 3:00 PM MT today — we'll start tomorrow
See full timeline
COLOR Pick yours
100% bolt-on, no welding Made in USA · Orem, Utah You break it, we replace it Joints you rebuild instead of replace
Mounting hardware included
Talk to an Expert: 385-375-2104
Lift Size
What size lift will the parts be used on?
1
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CORE 4X4 · Suspension

Jeep Wrangler JK / JKU 2pc Kit

Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Rear Upper Adjustable Control Arms

Adjustable control arms — rear upper · fits 0–6″+ lift

Does not fit your Ford Bronco Shop parts that fit ›

COLOR Pick yours

Build Your Kit

  • Vehicle
  • Brand
  • Color
  • Series
  • Hardware
  • Lift Size
  • Note to Core4x4:

$ 406.52 406.52 USD $ 461.95

$ 461.95

Save $ 55.43

Select Color to see price and add to cart.

Mounting hardware included
100% bolt-on, no welding Made in USA · Orem, Utah You break it, we replace it Joints you rebuild instead of replace
Talk to an Expert: 385-375-2104
Built to order, usually ships in 1–3 days.
Enter ZIP for arrival estimate Delivery date by ZIP
Order by 3:00 PM MT today — we'll start tomorrow
See full timeline

Alignment recommended Lifetime warranty on all non-wear items Made In USA

Made in USA Orem, Utah
You break it, we replace it Warranty on non-wear items
10 Colors In-house powder coat
Fully Adjustable 0-6" of lift
3 X-Series Options Only Core 4x4

Product Details

Make Model Submodel Years
Jeep Wrangler 2007–2018

  • Vehicle Fitment: Jeep Wrangler JK 07-18 – Enhances axle alignment, suspension stability, and overall handling for off-road and daily driving.

  • CORE Advantage: Johnny Joints provide extreme articulation and smooth suspension movement, ensuring superior traction and control on rugged terrain.

  • Adjustability: Fully adjustable for 0–6” lifts, allowing precise pinion angle adjustments to reduce drivetrain vibrations and improve ride quality.

  • Construction: Built from 1.5” OD DOM tubing with a 5/16” wall, engineered for maximum strength, flexibility, and long-term durability.

  • 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

Rear Upper control arms built with 1.75” OD 5/16” Wall DOM. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.625” long threads.

Forged Johnny JointJoints
1.75" OD lowers / 1.50" OD uppersTubing
5/16" DOMWall
Periodic greasingMaintenance

Construction & Materials

Rear Upper control arms built with 1.75” OD 5/16” Wall DOM. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.625” long threads.

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"+
Placement on Vehicle Rear Upper, Rear
Mounting Style Bolt-On

Achieve Superior Off-Road Performance

Enhance your Jeep Wrangler JK’s off-road capabilities with the Crawl Series Rear Upper Control Arms (CRL-J-JK-RU2). Designed for Jeep JK models (2007-2018), these control arms deliver unmatched flexibility, improved alignment, and exceptional durability. Whether tackling rugged terrain or cruising city streets, they provide the strength and adjustability needed for optimal performance.

Key Features and Benefits

  • High-Strength Construction – Crafted from 1.5" OD DOM Tubing with a 5/16” wall thickness, these control arms deliver superior durability and outperform competitor offerings.
  • Johnny Joints for Maximum Articulation – Featuring original Johnny Joints at both ends, these control arms provide unmatched flexibility and smooth operation for extreme off-road performance and on-road comfort.
  • Adjustability for Lifts – Fully adjustable to accommodate lift heights from 0 to 6 inches, allowing precise alignment corrections, pinion angle adjustments, and axle re-centering. Custom solutions are available for lifts exceeding 6 inches.
  • Seamless Suspension Integration – Designed to work seamlessly with other Crawl Series components, these control arms enhance overall suspension harmony and drivability, providing consistent and reliable performance in all conditions.

Two-Stage Powder Coating

Each control arm undergoes a rigorous two-stage powder coating process for enhanced durability and corrosion resistance. Zinc primer base protects against rust. Topcoat available in 10 customizable colors offers a durable, stylish finish that complements your Jeep’s look.

Made in the USA

Proudly designed and manufactured in Orem, UT, the Crawl Series Rear Upper Control Arms exemplify the best in American craftsmanship. By choosing CORE 4X4, you support local industries while investing in premium-quality components that meet the highest performance standards.

Optional Hardware Upgrade

Installing the Crawl Series Rear Upper Control Arms is a straightforward process using your Jeep’s factory hardware. Optional Grade 8 hardware kits are available separately for vehicles with rusted or stubborn bolts, ensuring a hassle-free setup.


Each rebuild kit includes all necessary components to replace and restore wearable parts.

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.

Google

Store reviews on Google

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5.0
★ ★ ★ ★ ★
132 reviews
5 ★
97%
4 ★
2%
3 ★
0%
2 ★
1%
1 ★
0%
GH
Gary Haag Aug 25, 2025
★ ★ ★ ★ ★ Google
Ordered a set of Core 4x4 control arms for my 2006 Jeep TJ. These are some heavy duty quality control arms. Can't wait to get them installed. Great customer service too!
MR
Melanee Raynes Mar 25, 2019
★ ★ ★ ★ ★ Google
Awesome product and service! I even got some of their swag because it looked pretty darn good. I will definitely be going back and would suggest this business to others looking for quality control arms. Buy local!
NM
Noah Myers Mar 23, 2024
★ ★ ★ ★ ★ Google
I contacted these guys on a Saturday through email and needed some control arms by the following weekend, Spence got back with me and told me he would make sure the order got shipped out on Monday, they got busy and wasn’t able to ship the package out so he got back with me that evening and upgraded my shipping for free and shipped out the next day, only because he told me he’d make sure I’d have them by the weekend! This company sticks to their word! The customer service from these guys are unmatched and they will have another lifetime customer here!
BS
Bailey Smith Mar 23, 2025
★ ★ ★ ★ ★ Google
Core 4x4 excels with precision and service and keeps nothing else higher in mind. Everyone I've met at the company is very honest and down to earth, 10/10 would recommend.
TM
T Mac Mar 23, 2026
★ ★ ★ ★ ★ Google
CORE 4X4 Company produces/manufactures exceptional products. My rear upper and lower control arms and rear track bar were powder coated custom Fox “Shock Orange” for my 2024 Bronco Wildtrak. OEM looks minimal compared to the CORE 4X4 control arms. Plus they’re adjustable, serviceable and rebuildable. Shipment was very fast and packaging used custom foam wrapped around the arms and heavy duty boxes. Not even UPS could damage. Korby L. was great to work with and responded quickly with emails and product information. Great products. Great people from the State of Utah. All Made in the USA. 5 Stars!!!
RM
R2d2 Movi78 Feb 21, 2026
★ ★ ★ ★ ★ Google
I’m extremely impressed with Core 4x4. The quality of their parts is outstanding — everything feels solid, well‑built, and engineered with real attention to detail. Shipping was fast and everything arrived perfectly packaged. Their customer service is just as good as their products: responsive, helpful, and genuinely committed to making sure you get exactly what you need. Overall, a top‑tier experience. I’ll definitely be buying from them again. Specially thank you Mr. Linscomb from Core 4x4. Arturo M.
TD
Tim Davis Sep 24, 2025
★ ★ ★ ★ ★ Google
Customer service is amazing, responds fast and know what they are talking about. Their product looks top of the line.
DN
Devan Nelson Mar 25, 2019
★ ★ ★ ★ ★ Google
Had a great experience with Core 4x4, I desperately needed a custom track bar and found out just a couple days before Easter Jeep Safari. Spence was a huge help and made it happen with plenty of time to spare. Their parts are top notch!
EA
Eric Ahonen Mar 24, 2021
★ ★ ★ ★ ★ Google
Awesome control arms! My mechanic said “ your Jeep is pretty much bulletproof now.” And I just got the tier 1 arms! The people at the core 4x4 shop were really nice too. They were running behind on shipping, (which is understandable) so I decided to go pick it up because it was only an hour drive. They gave me a free $60 hardware kit for the inconvenience. Thanks core 4x4! You guys are awesome!!
DA
Dastrup Auto Mar 25, 2019
★ ★ ★ ★ ★ Google
I have bought a bunch of sets of arms, track bars and even had custom work done by Core 4x4. Just yesterday, Spence and Cam delivered an awesome cross member they designed and built for me! All of their products have been exceptional! I have personally seen their progression with design changes/updates. They truly take pride in their work and products. Quality control is second to none! They’ve also helped me diagnose issues with different jeeps I’ve had, as well as Dodge/Rams. These guys know their stuff! Really! I trust them whole heartedly and absolutely love their products/quality of work! I’ve referred many people, and will always continue to do so. Keep up the good work Core4x4!
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Made in Orem, UT · You break it, we replace it.
385-375-2104
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