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Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Front Upper Adjustable Control Arms
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254.70 254.7 USD 309.70

309.70

(Save 18%)

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Order today — ships by Mon, Jun 1
Salt Lake City, UT change
Order by 3:00 PM MT today — we'll start tomorrow
See full timeline
Lifetime warranty Fitment guarantee Ships from Orem, UT 4–8 hr install
Free mounting hardware included — a $20 value
COLOR 11 colors — pick yours
https://core4x4.com/web/image/product.template/2154/image_1920?unique=09d00f0

2pc Crawl Series Front Upper Adjustable Control Arms

Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Front Upper Adjustable Control Arms
SKU: CRL-J-JK-FU2
Pick your vehicle to confirm fit

254.70 254.7 USD 309.70

309.70

(Save 18%)

COLOR 11 colors
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.
Compare all tiers →

Build Your Kit

  • Vehicle
    Confirm this matches your vehicle. Use Shop by Vehicle to filter correctly.
  • Brand
  • Color
    Powder coat color for control arms and track bars. Does not affect performance.
  • Series
    Cruise: daily driving and light off-road. Camp: overlanding. Crawl: aggressive rock crawling.
  • Lift Size
    Choose your current front lift height. Measure from center of wheel to fender if unsure.
  • Hardware
    Choose upgraded hardware if your factory hardware is worn, damaged, or missing.
  • Note to Core4x4:

Select Color to see price and add to cart.

Order today — ships by Mon, Jun 1
Salt Lake City, UT change
Order by 3:00 PM MT today — we'll start tomorrow
See full timeline
Free mounting hardware included — a $20 value

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

Made in USA Orem, Utah
Lifetime Guarantee Unconditional
10 Colors In-house powder coat
Fully Adjustable 0-6" of lift
3 X-Series Options Only Core 4x4

Crawl Series Front Upper Control Arms (CRL-J-JK-FU2) for Jeep Wrangler JK (2007-2018)

Enhance your Jeep Wrangler JK's performance with the Crawl Series Front Upper Control Arms (CRL-J-JK-FU2). Designed to deliver unparalleled off-road flexibility and precise on-road handling, these control arms are a must-have upgrade for serious Jeep enthusiasts. Whether you're tackling rugged trails or cruising the highway, this component provides the adjustability, durability, and reliability your vehicle demands.

Key Features and Benefits

  • Premium Construction: Made from 1.5" OD DOM Tubing with a robust 5/16” wall thickness, these control arms are built to withstand extreme conditions.
  • Original Johnny Joints: Features Johnny Joints from Rock Jock 4x4 at the adjusting end for smooth articulation and superior durability.
  • Adjustability for Lifts: Fully adjustable to accommodate lift heights from 0 to 6 inches, allowing for precise alignment and front axle re-centering. For lifts exceeding 6 inches, additional options are available upon request.
  • Improved Handling: Enhances vehicle stability and off-road performance while maintaining reliable on-road manners.
  • Upgrade Potential: Pairs seamlessly with our Front Lower Control Arms for a complete front-end upgrade, improving overall suspension performance and durability.

Two-Stage Powder Coating

All Crawl Series Control Arms undergo a two-stage powder coating process for superior durability and corrosion resistance. A zinc primer base coat provides a strong foundation, followed by a tough topcoat available in 10 color options to match your style while protecting your components.

Made in the USA

Proudly designed and manufactured in the United States, these control arms are crafted with precision and quality that meet the highest standards of American manufacturing. When you choose the Crawl Series, you’re supporting local craftsmanship and benefiting from reliable engineering.

Optional Hardware Upgrade

The Crawl Series Front Upper Control Arms are designed for straightforward installation using factory hardware. For vehicles with rusted or stubborn bolts, optional Grade 8 hardware kits are available to make the process even smoother and more reliable.

  • Vehicle Fitment: Jeep Wrangler JK 07-18 – Enhances stability, axle alignment, and off-road performance while maintaining smooth on-road handling.

  • CORE Advantage: Johnny Joints provide insane articulation and flexibility, allowing for maximum suspension travel and improved off-road control.

  • Adjustability: Fully adjustable for 0–6” lifts, ensuring precise axle re-centering, caster correction, and optimal suspension geometry for any terrain.

  • Construction: Made from 1.5” OD DOM tubing with a 5/16” wall, powder-coated for extreme strength, durability, and long-term corrosion resistance.

  • 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 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.

Make Model Submodel Years
Jeep Wrangler 2007 - 2018

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

Construction & Materials

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 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
Lift Size 0" — 6" or 6"+
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.

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Reviews of Core 4x4

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5.0
132 reviews
5
97%
4
2%
3
0%
2
1%
1
0%
RH
R and H H Oct 24, 2025
Google
Top notch company. Mechanic lost bolts that clamp upper control arms. Korby sent out spare bolts no charge. Best customer service I’ve come across in a long time. Only suspension brand I’ll ever use.
MP
Mirko Pompili Mar 19, 2026
Google
I want to share a truly positive experience. I ordered a car kit consisting of two packages, but unfortunately one was lost during shipping with UPS. The situation could have become complicated... but it didn't. The company manager was extremely helpful and professional: he personally followed up on the situation and did everything he could to resolve the issue, even sending me the package again without hesitation. It's rare to find such attentive and reliable customer service these days. My sincere congratulations on your professionalism and commitment: that makes all the difference.
PG
Paul Griffin Feb 21, 2026
Google
Great long arm kit with everything else I needed as well! They worked with me to ensure that I was getting an upgraded components kit just like I wanted. Fast shipping with some of the best packaging that I have ever seen. Nothing was scratched or missing and this kit is even more impressive than the videos or website can show. Powder coating looks great with no issues. I would highly recommend CORE 4x4 to anyone looking for a great quality kit.
P
Paul Mar 24, 2023
Google
I've been having trouble with the track bar (on my 2nd gen Dodge) since I installed the 3rd gen Synergy adapter bracket and a 3rd gen stock bar.. oddly, they call it a '3rd gen bracket' and the stock 3rd gen bar doesn't quite fit, making contact with the bracket. I had attempted to clearance the bracket but it was still making contact and I could feel it over large bumps. I reached out to a lot of companies, but Core 4x4 offered to make a custom bar for the application with adjustability and dual Johnny joints. The first pass on it didn't work but they sent me out another passenger side end that made it fit incredibly well. This was all done solely over email/descriptions/pictures/measurements. Bar is super high quality and heavy duty, made in the US by a family owned company and carries a lifetime warranty. The customer service was responsive and superb, and the price was a lot less than I expected.
AH
Abbey Hiett Mar 25, 2019
Google
Company finally made things right
D
DSI Jul 26, 2025
Google
Great products with excellent customer service after the sale
AM
Adam M Sep 24, 2025
Google
First time buying from Korby @ Core 4x4 and it’s being nothing short of a great experience. I bought the non adjustable Trail kit for my 5th Gen Ram 1500 with a 2” lift. The welds look great, nice powder coat finish and quality bushing. Had some trouble fitting the grease nipples due to the powder coating but a thread tap would fix that. They fit easily and perform great. I felt the improvement straight away. No more wheel hop on hard acceleration which was my main reason for the purchase. I was missing some smaller bushings needed for the 5th Gen and Korby’s custom service was on point, with responsive emails and mailing out the missing parts straight away. Very happy with their products and customer service. Highly recommended company👌🏽
Review photo 1 Review photo 2 Review photo 3 Review photo 4
JF
jacob fezza Mar 24, 2022
Google
I wanted to take a moment and give these guys a shout out, I’ve currently got, for my xj, their adjustable control arms, tier 4 adjustable track bar and adjustable leaf spring shackles. You can always count on a fair price, high quality products, and quick delivery. Keep up the great work guys, will definitely continue to shop with you
8
89Patriot Jan 22, 2026
Google
Great company! I have used there products consistently with no complaints with quality you can see and feel. From my experience, their customer service is also amazing. Core 4x4 has no issues standing behind their already amazing products and will quickly and professionally solve issues may they arise. I will continue to be a customer.
RH
Rex Hodges Jun 26, 2025
Google
After ordering an upper and lower adjustable control arm kit manufactured by CORE 4X4 from a jeep parts distributor who's intials are E.T., they came with 3 of the threaded ends missing. After over 2 months of phone calls and emails to this E.T. company nothing was resolved. I finally decided to call CORE 4X4 myself and tell them my dilemma. I spoke with a very personable and professional gentleman named Korby, who is one of CORE 4X4's representatives, after a brief discussion of what I went thru he simply asked me for a picture and some measurements and the items I was missing and asked if I could cover ONLY the cost of shipping and I had my missing parts in exactly 1 weeks time. This company not only builds all it's parts in the U.S.A., they stand behind their products with great customer service and life time warranty. My experience with this company and their Rep Korby was fantastic. I would definitely recommend CORE 4X4 to anyone who needs parts for any 4x4 projects. You just can't beat their quality and service. Rex Hodges Valparaiso, Indiana

Specifications

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.
Lift Size 0" — 6", 6"+
Hardware No Hardware, Complete Kit
Vehicle Jeep Wrangler JK / JKU (07–18)
Brand CORE 4X4
Series Crawl Series
Note to Core4x4: -
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