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4pc Crawl Series Rear Adjustable Control Arm Kit

Ford Bronco 21+ 4pc Crawl Series Rear Adjustable Control Arm Kit
SKU: CRL-F-BR-2021-RS4 ★★★★★ (132 reviews)
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907.16 907.16 USD 1,007.95

1,007.95

(Save 10%)

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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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Lifetime warranty Fitment guarantee Ships from Orem, UT 4–8 hr install
COLOR 11 colors — pick yours
https://core4x4.com/web/image/product.template/1738/image_1920?unique=edc8f61

4pc Crawl Series Rear Adjustable Control Arm Kit

Ford Bronco 21+ 4pc Crawl Series Rear Adjustable Control Arm Kit
SKU: CRL-F-BR-2021-RS4
Pick your vehicle to confirm fit

907.16 907.16 USD 1,007.95

1,007.95

(Save 10%)

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.
  • Hardware
    Choose upgraded hardware if your factory hardware is worn, damaged, or missing.
  • Lift Size
    Choose your current front lift height. Measure from center of wheel to fender if unsure.
  • 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

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

Unmatched Flexibility Durability

Elevate your off-road performance with the Crawl Series Rear Control Arms Set, specifically designed for Ford Bronco model years 2021-Present. This set includes two upper (CRL-F-BR-2021-RU2) and two lower (CRL-F-BR-2021-RL2) control arms, offering a comprehensive upgrade that combines exceptional durability with unmatched flexibility. These control arms deliver superior handling and stability, enhancing your vehicle’s capabilities both on and off the road.

Superior Construction

Crafted from premium 5/16” wall DOM Tubing, our upper and lower control arms are built for strength and endurance. Featuring original Johnny Joints at both ends, these components deliver outstanding off-road articulation while maintaining durability and resilience, outperforming factory parts and other aftermarket options.

Easy Adjustability for Precision Alignment

Designed with left and right-hand threaded bodies, these control arms provide effortless adjustability. Fine-tune your suspension setup directly on the vehicle to achieve optimal axle centering and pinion angle adjustments. The Crawl Series Rear Control Arms Set accommodates lifts ranging from 0 to 6 inches, ensuring precise alignment and improved performance. For lifts beyond 6 inches, additional solutions are available upon request.

Durable Two-Stage Powder Coating

All control arms are subjected to a dual-layer powder coating process. Starting with a zinc primer for corrosion resistance, each arm is finished with a top coat in your choice of color from our palette of 10 options. This ensures a robust finish that resists harsh environmental conditions while allowing you to customize your vehicle's appearance.

Made in the USA

The Crawl Series represents the best in American craftsmanship. Manufactured in our Orem, UT facility using locally sourced materials, these control arms reflect CORE 4X4’s commitment to exceptional quality and performance while supporting American manufacturing.

Straightforward Installation

Installation is designed to be simple, using factory hardware for a seamless setup. For situations involving rusted or stubborn bolts, optional Grade 8 hardware kits are available separately to ensure a hassle-free process.

Key Features and Benefits

  • Premium 5/16” wall DOM Tubing for maximum strength and durability
  • Equipped with original Johnny Joints for superior articulation
  • Effortless adjustability with left and right-hand threaded bodies
  • Compatible with lifts ranging from 0 to 6 inches, with additional solutions available
  • Dual-layer powder coating for corrosion resistance and customization
  • Manufactured in the USA with high-quality, locally sourced materials
  • Simple installation using factory hardware, with optional hardware kits available

 

  • Vehicle Fitment: Ford Bronco 21+ – Designed to enhance rear suspension performance, axle stability, and articulation for both off-road adventures and daily driving.

  • CORE Advantage: Outperforms competitors with dual forged joints for maximum articulation, superior durability, and on-vehicle adjustability, eliminating limitations of traditional control arms.

  • Adjustability: Fully adjustable for lifts from 0 to 6 inches, allowing precise axle re-centering, pinion angle correction, and optimized suspension geometry for extreme performance.

  • Construction: Crafted from 5/16” wall DOM tubing with Johnny Joints at both ends, offering industry-leading durability, articulation, and smooth operation under the toughest conditions.

  • 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 Lower 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.

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.

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 Crawl Series Rear Lower Adjustable Control Arms

Rear Lower 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.

Ford Bronco 21+ 2pc Crawl Series 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 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 Lower, Rear
Mounting Style Bolt-On
Google

Reviews of Core 4x4

See all on Google
5.0
132 reviews
5
97%
4
2%
3
0%
2
1%
1
0%
RT
Ruby Timm Apr 27, 2025
Google
Bought a new 2019 Ram 1500. Had bad rear wheel hop since new, got all four core 4x4 control arms and it fixed the issue. Thanks
HK
Harold Kruder Mar 23, 2024
Google
I needed some parts and had to replace 1 lower control arm and their customer service is great. Helped with answering my questions and got parts shipped quickly.
D
Don Jul 26, 2025
Google
Great shop, great parts and great service. You want to buy off this company and company’s like this!!!! Wish we had more companies as good as this one!! Thank you
DW
Darin Wuebbels May 27, 2025
Google
Thanks for the fabulous customer service. Your products and customer service are first class. I highly recommend these guys. Excellent experience.
Review photo 1
TH
Todd Hume Jan 22, 2026
Google
Their products are great but the service is even better!! Thanks Korby.
SH
Shawn Hooten Apr 27, 2025
Google
Great products, shipped the next day during a big sale event. Core 4x4 gets it right and gets it done! Thank you all.
AS
Anthony Snyder Jun 26, 2025
Google
Great experience and really great parts
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!
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.
CM
Cameron Masters Mar 24, 2023
Google
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.

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.
Hardware No Hardware, Complete Kit
Lift Size 0" — 6", 6"+
Vehicle Ford Bronco (21–Present)
Brand CORE 4X4
Series Crawl Series
Note to Core4x4: -
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