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4pc Rear Adjustable Control Arms Kit

Ford Bronco 21+ 4pc Rear Adjustable Control Arms Kit
SKU: F-BR-2021-AL-RS4 ★★★★★ (132 reviews)
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1,212.70 1212.7 USD 1,212.70

1,212.70

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Order today — ships within 1–3 business days
Enter ZIP for arrival estimate change
Order by 3:00 PM MT today — we'll start tomorrow
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100% bolt-on no welding MADE IN USA · Orem, Utah Expert Support 100K+ Community
Free mounting hardware included — a $40 value
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COLOR Pick yours
https://jerdev.core4x4.com/web/image/product.template/1375/image_1920?unique=982bc5a

4pc Rear Adjustable Control Arms Kit

Ford Bronco 21+ 4pc Rear Adjustable Control Arms Kit
SKU: F-BR-2021-AL-RS4
Pick your vehicle to confirm fit

1,212.70 1212.7 USD 1,212.70

1,212.70

COLOR 12 colors
Black Blue Charcoal Green LightGreen Orange Purple Red White Yellow Raw Aluminum Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.
  • 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.
  • 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 within 1–3 business days
Enter ZIP for arrival estimate change
Order by 3:00 PM MT today — we'll start tomorrow
See full timeline
Free mounting hardware included — a $40 value

Lifetime warranty on all non-wear items Made In USA

1–3 day build time + Shipping

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

Unmatched Flexibility Durability

Upgrade your Ford Bronco (2021-Present) with the Aluminum Series Rear Control Arms Set, engineered for maximum off-road articulation, improved axle alignment, and long-term durability. This complete rear suspension upgrade enhances both on-road comfort and off-road capability, offering a significant improvement over factory components.

Key Features Benefits

  • Precision-Engineered 7075 Aluminum – Constructed from 1.75” OD 7075 Aluminum, these control arms deliver exceptional strength while remaining lightweight, significantly outperforming stock components.
  • Extreme Off-Road Articulation – Johnny Joints at both ends allow for maximum suspension travel, improving off-road traction, axle control, and shock absorption.
  • Fully Adjustable for Lifted Vehicles – Designed to accommodate lifts from 0 to 6 inches, these control arms enable precise axle centering and pinion angle adjustments, optimizing suspension geometry for better handling and durability.
  • Machined Wrench Flats for Easy Adjustments – The left- and right-hand threaded bodies make fine-tuning your suspension simple, allowing for on-the-vehicle adjustments without removal.

Superior Lightweight Construction with 'Memory'

Crafted from high-strength 7075 Aluminum, these control arms provide a durable yet lightweight alternative to steel. Unlike traditional materials, 7075 Aluminum has a "memory" effect, meaning it can return to its original shape after taking an impact, ensuring long-lasting structural integrity.

Customizable Powder Coating

Showcase your Bronco’s unique style with our customizable powder coating options. Choose the raw aluminum finish for a sleek, high-performance look, or select from ten vibrant colors to match your build.

Proudly Made in the USA

Our Aluminum Series Rear Control Arms Set is proudly designed and manufactured in the USA, ensuring strict quality control, superior craftsmanship, and premium materials. Choosing CORE 4X4 means supporting American innovation and excellence.

Optional Hardware Upgrade

Designed for seamless installation using factory hardware, these control arms provide a straightforward upgrade. If you're dealing with rusted or stubborn bolts, we offer optional Grade 8 hardware kits separately for a hassle-free installation.


Make Model Submodel Years
Ford Bronco 2021 - Present

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

Construction & Materials

Ford Bronco 21+ 2pc Rear Lower Adjustable Control Arms

Rear Lower control arms built with 1.75” 7075 Aluminum. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.625” long threads.

Ford Bronco 21+ 2pc Rear Upper Adjustable Control Arms

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 Ford Bronco (21–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 Raw Aluminum or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.
Hardware No Hardware or Complete Kit
Placement on Vehicle Rear Upper, Rear Lower, Rear
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.

Google

Reviews of Core 4x4

See all on Google
5.0
132 reviews
5
97%
4
2%
3
0%
2
1%
1
0%
MV
Mr. V Mar 24, 2021
Google
Good quality parts, much stronger than stock
BA
bryan angell Jun 26, 2025
Google
First off amazing products. I got a set of adjustable control arms for my XJ and it is so nice to be able to dial in caster and pinion angles. A quick call and I was able to purchase an adjustable track.
Review photo 1
GK
GLENN KOSZKA Apr 27, 2025
Google
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 ! ! !
BB
Brayden Brockey Mar 23, 2024
Google
Got a set of upper control arms for my xj, really impressed with the quality
Review photo 1
J
Justin Mar 24, 2021
Google
Small business, family owned, made in the USA, lifetime warranty. Purchased Tier 3 control arms and rear track bar for a 2006 Jeep LJ. Simple website and easy to contact over phone and email. I had some technical questions and they were happy to answer them. They allow local pickup and were built to order same week. The order was wrapped and ready when I walked in and even gave a tour of the shop. They abrasive blast all raw materials to achieve a better surface profile for powdercoat to adhere and create a smooth, durable finish. I also noticed several CNC machines and a robotic welder they use for all their parts. A small outfit with a robotic welder? Their concern for quality is obvious and it shows in the parts they make. Very impressed. Happy to do business with these guys.
Review photo 1
TG
Travis Grimm Mar 23, 2024
Google
To start off if you're looking to upgrade your control arms definitely hit this company up. Great product, easy install of the product, with three different tiers everything is priced pretty good, I'm a sticker guy and they sent a sticker for each arm each track bar and also three extra ones so the extra are on the Jeep the advertise them for sure. If you're reading this review I highly recommend you to check their website out.
Review photo 1 Review photo 2 Review photo 3 Review photo 4
GV
Gil Valk Sep 24, 2025
Google
Excellent service, Prompt responses when needing technical assistance, Amazing looking parts that fit excellently. I would recommend them to anyone looking for suspension components. Also very well packaged when we received the shipment, which means no damage from shipping company!! We went with the Crawl Series double adjustable kit and it definitely looks killer on our build!!!
Review photo 1 Review photo 2 Review photo 3 Review photo 4
PB
Peter Busack May 27, 2025
Google
Purchased a set of Trailing arms for my Ram 1500, quality is first class. I bought the ones with the Jonny Joints for more articulation and it appears from the construction I should get a lifetime of use, Zerk fittings are an added plus. Would defiantly recommend, and the the service team answered all of my questions.
MT
Mike T Nov 23, 2025
Google
Korby and the rest of the team at Core 4x4 know there stuff and answered my question in a timely manner. They even were able to quick ship a re-build kit for me so I could get my truck back on the road- Thanks!
JA
Jonathan Aguilera Jan 22, 2026
Google
Great experience with Core 4x4! I purchased some suspension parts for my dad's 98 Jeep TJ. The products they make are super durable and look even better in person. Attention to detail and overall superior quality. The staff at Core 4x4 is super helpful also, Korby has been great. Updating me on the status of my order and sending me tracking numbers as well. Thank you all at Core 4x4, keep up the amazing work!

Specifications

Color Black, Blue, Charcoal, Green, LightGreen, Orange, Purple, Red, White, Yellow, Raw Aluminum, 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 Ford Bronco (21–Present)
Brand CORE 4X4
Note to Core4x4: -
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Made in Orem, UT · Lifetime warranty
(801) 850-2920