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Master Rebuild kit for CMP-J-JT-RS4
SKU: CMP-J-JT-RS4-MRK ★★★★★ (132 reviews)
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137.28 137.28 USD 156.00

156.00

Not Available For Sale
(Save 12%)

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Fitment guarantee Ships from Orem, UT 4–8 hr install
https://dev.core4x4.com/web/image/product.template/27072/image_1920?unique=09d00f0

Master Rebuild kit for CMP-J-JT-RS4

Master Rebuild kit for CMP-J-JT-RS4
SKU: CMP-J-JT-RS4-MRK
Pick your vehicle to confirm fit

137.28 137.28 USD 156.00

156.00

Not Available For Sale
(Save 12%)

Compare all tiers →

Select Color to see price and add to cart.

Lifetime warranty on all non-wear items United States

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

Everything you need to refresh your suspension.

This rebuild kit includes all the essential components needed to replace common wear items and restore performance.

CE-9110RK × 4

BSH-CB-2579 × 4

Make Model Submodel Years
Jeep Gladiator 2020 - Present

Construction & Materials

Jeep Gladiator JT 20+ 4pc Camp Series Rear Adjustable Control Arm Kit

Rear Upper Control Arms Built With 1.75” OD 5/16” Wall DOM. Polyurethane Bushing on the fixed end and a Forged Johnny Joint on the adjustable end with 1.25” x 12 TPI - 2.625” long threads.

Rear Lower Control Arm Built With 1.75” OD 5/16” Wall DOM. A Polyurethane Bushing on the fixed end and a Forged Johnny Joint on the adjustable end with 1.25” x 12 TPI - 2.625” long threads.

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Reviews of Core 4x4

See all on Google
5.0
132 reviews
5
97%
4
2%
3
0%
2
1%
1
0%
RC
Ryan Colligan Mar 4, 2026
Google
I have nothing but good things to say about Core 4x4. I have the crawler series on my JKU and we take it all over the place. These parts handle everything we throw at them.
E(
Eric Hernandez (savagefit) May 27, 2025
Google
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.
D
DSI Jul 26, 2025
Google
Great products with excellent customer service after the sale
JS
Jon Stempien May 27, 2025
Google
Big thanks to Corby at core 4 x 4 outstanding customer service I like to thank them or 4 x 4 for helping me Well-made product in the United States recommend core 4 x 4 for all jeep Owners that like the four wheel
MN
Mike Nielsen Nov 23, 2025
Google
The customer service is first class. I had an issue with a track bar I installed on my F350. I don’t have any other Core 4x4 parts yet, but with the way I was treated, I know their parts are well done, because they went above and beyond to make sure I was made whole. They wouldn’t be in business if they had to take care of a lot of people like they took care of me. Will definitely be back when it’s time to build the Jeep!
RD
Reagan D'mello Dec 23, 2025
Google
Love the product. Excellent customer support 👍🏽 …
JH
Joe Hu Sep 24, 2025
Google
Amazing! I put all my new control arms and it drives a lot smoother and looks great!!!
Review photo 1
A
Adam Oct 24, 2025
Google
I couldn't have been more excited for the initial unboxing of these new Core 4x4 UCA's! They appear to be so well built and just a true quality product. Installation was a breeze and the initial testing with the forklift appears to have given me some additional flex with less binding on the rest of the components now that the geometry is back properly aligned. Time will tell how they hold up on my near future off-road adventures but I don't have any doubt that they are up to the task!
Review photo 1 Review photo 2 Review photo 3 Review photo 4
L
luke Mar 24, 2021
Google
Excellent quality product and service. My l lower control arms broke and within the same day core 4x4 hooked me up with tier 2 arms and with the color I wanted. My Jeep rides better and has been solid for several months so far. 10/10 would recommend their products to anyone.
SG
Sal Giordano Sep 24, 2025
Google
I want to take the time to share my experience with Core 4x4. I have a 2004 Jeep Wrangler and was looking to upgrade some suspension parts. I went with Core 4x4 upper & lower adjustable control arms and a front adjustable track bar. Everything arrived quickly, and right out of the box I was impressed with the quality and craftsmanship. I had a few questions during installation (measurements and torque specs), and I spoke with Korby on a couple of occasions. Not only did he send me detailed instructions, but he also shared an installation video specific to the part and vehicle I was working on, something you don’t get from many companies. The control arms fit perfectly, look great, and perform exactly as I hoped. I did run into an issue with the front track bar touching the front diff. When I reached out, Korby had me send pictures and then immediately offered two solutions: his bar guy could make a different bend and send it out to me, or I could get a full refund. His response honestly blew me away. As much as I wanted to run the Core 4x4 track bar, I chose the refund. Korby sent me a prepaid shipping label right away, no hassle. My experience with Core 4x4 has been excellent. Korby was extremely understanding, communicative, and helpful every step of the way. The parts I received were high quality, and the customer service was second to none. I would absolutely recommend Core 4x4 10 out of 10 times and will be using them again. Just a great American company with awesome people who truly care about their customers. Thank you Korby, and thank you Core 4x4!
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