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 | 1997–2006 | |
| Jeep | Wrangler | 2004–2006 |
Johnny Joints both endsJoints
7075 aluminumTubing
Periodic greaseMaintenance
Construction & Materials
Bar: 1.5" solid 7075-T6 · Frame end: forged Rock Jock Johnny Joint (CE-9112NSPL) · Axle end: steel U-bracket · Double-adjustable
| Brand | CORE 4X4 |
| Color | Black or Blue or Charcoal or Green or LightGreen or Orange or Purple or Red or White or Yellow or Raw Aluminum or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
| Lift Size | 0" — 6" or 6"+ |
| Series | Aluminum |
| Placement on Vehicle | Front |
| Mounting Style | Bolt-On |
Details
The aluminum counterpart to our steel Crawl-tier TJ/LJ front upper arms — 1.5" solid 7075-T6 bar, double-threaded like the rest of the set: a forged Rock Jock Johnny Joint at the frame end and a steel U-bracket at the axle end, welded to a threaded shank so both ends thread into the arm. Double-adjustable with milled wrench flats to set caster with the lowers.
Includes
- 2 assembled, double-adjustable aluminum front upper control arms (driver + passenger)
- Forged Rock Jock Johnny Joint (frame end) and steel U-bracket (axle end), installed
- Mounting bolts and jam nuts
Specs
- Bar stock — 1.5" solid round 7075-T6 aluminum
- Joints — greaseable forged Rock Jock Johnny Joint (frame end); steel U-bracket (axle end); double-threaded
- Adjustable length — for setting caster
- Finish — powder coat or raw aluminum
- Lift range — 0–6 in.
- Made in the USA
- You break it, we replace it
- Wear items (joints) — covered for 18 months
Notes
- Hardware is included with your arms. If you ever need replacements down the road, the matching kit is available separately.
- Apply anti-seize to the aluminum-to-steel joint threads on install — cheap insurance against galling on any aluminum arm.
- Running a lift? The front set (AL-J-TJLJ-FS4) pairs these with the matching front lowers to do the whole front in one job.
Parts
- Forged Rock Jock Johnny Joint, left-hand — CE-9112NSPL (1 per arm, 2 for the pair).
- Replacement hardware kit — CRL-J-TJLJ-FU2-HWK.
Fits
- Jeep Wrangler TJ (1997–2006)
- Jeep Wrangler Unlimited LJ (2004–2006)
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, and any add-on options, then add to cart — you’ll confirm your lift height at checkout. 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.
Store reviews on Google
5.0
★
★
★
★
★
132 reviews
JI
Jerome Segura III
Jun 26, 2025
★
★
★
★
★
I bought the 16pc Cruise Series Adjustable Control Arm, Track Bar, Steering, End Link Kit to replace a worn budget 4" lift on my used JKU. These are top quality parts; very solid. Customer service is unsurpassed. They even matched prices on my order placed before the tax day sale. I made an error in ordering a drag link flip kit; they were quick to help me fix this too. There's peace of mind knowing these components are made in the USA. Thank you. 👍👍
MT
Marcus Torres
Jan 15, 2026
★
★
★
★
★
Best control arms I have installed on any of my builds. After running every major manufacturer, Core 4x4 is on par or better than all the high-end companies at a fraction of the cost. Lifetime warranty is the cherry on top.
CM
Cameron Masters
Mar 24, 2023
★
★
★
★
★
Absolutely incredible family owned business. I asked to pick up my order since I’m local and they came in on a weekend to accommodate. Had to make some adjustments to parts and took the time to make sure it was perfect. Parts are incredible quality. If you have a Jeep, do not hesitate to support this local business.
E(
Eric Hernandez (savagefit)
May 27, 2025
★
★
★
★
★
The whole process was quick and painless. The products are top tier and when I reached out them for package update info, Korby Linscomb was very responsive, and got me the answers I needed the same day. Even when I emailed back to some additional info, he sent what I was looking for that same day. I love core 4x4 and will be giving them my business from now on.
MP
Mirko Pompili
Mar 19, 2026
★
★
★
★
★
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.
GM
George Mar
Sep 24, 2025
★
★
★
★
★
Great company. Highly satisfied with Core 4x4 customer service. Had some bushings fall apart around 600 miles from home. Called and spoke with Korby Linscomb on Thursday, late in the afternoon. He was able to get my bushings sent across country overnight at a very reasonable rate. Had me up and running by Friday evening with enough time to enjoy the Great Smoky Mountain Jeep Invasion. Thanks Guys!
MV
Mr. V
Mar 24, 2021
★
★
★
★
★
Good quality parts, much stronger than stock
JJ
Jason Jukich
Jul 26, 2025
★
★
★
★
★
Fast shipping, excellent communication, and awesome products
A
Aaron
Mar 23, 2024
★
★
★
★
★
I have recently come to know Core 4x4 when I purchased a Jeep XJ and was looking for a place that had dedicated XJ suspension and components. Here is what makes them different than most other shops. All of their components are top shelf quality and they back it up if you break any of it. I was able to see their shop when I picked up an order locally and was impressed with their attention to detail and how they assemble and powder coat each part. I had an issue with a shackle and needed the threaded shaft to be shorter. I called in and talked to Kaden and he told me to come by and they would shorten it for me. When I got there, Kaden and Spencer (the owner) met me and talked about options and proceeded to make the right adjustments to fit my XJ. Told me if anything changes in the future and I need additional length, they would take care of me. So what really sets them apart from others is their Customer Service. Try calling in to any other Jeep suspension or part shop and see how they treat you. Been there - done that.
Will continue to do business with Core and their team. Getting that kind of service for just a shackle has me thinking I may need to replace my JT components with Core's. Thanks Guys for being helpful good humans!
GK
GLENN KOSZKA
Apr 27, 2025
★
★
★
★
★
The folks at Core 4X4 are always wonderful to deal with. They explain your options and never pressure or rush things. The quality of the Core Control Arms is top shelf, especially if your goal is to stop wheel hop. I recommend Core 4x4 without reservation ! ! !
