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5pc Crawl Series Rear Adjustable Control Arm, Track Bar Kit

Ford Bronco 21+ 5pc Crawl Series Rear Adjustable Control Arm, Track Bar Kit
SKU: CRL-F-BR-2021-K5 ★★★★★ (132 reviews)
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1,181.21 1181.21 USD 1,312.45

1,312.45

(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/1652/image_1920?unique=edc8f61

5pc Crawl Series Rear Adjustable Control Arm, Track Bar Kit

Ford Bronco 21+ 5pc Crawl Series Rear Adjustable Control Arm, Track Bar Kit
SKU: CRL-F-BR-2021-K5
Pick your vehicle to confirm fit

1,181.21 1181.21 USD 1,312.45

1,312.45

(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 Off-Road Flexibility On-Road Stability

Take your Ford Bronco (2021-Present) to the next level with the Crawl Series Rear Control Arm and Track Bar Kit. This complete suspension upgrade enhances articulation, axle alignment, and overall durability, providing superior performance over factory and aftermarket alternatives. Designed for maximum adjustability and strength, this kit allows you to fine-tune your suspension for any terrain.

Key Features and Benefits

  • Heavy-duty DOM tubing construction – Built from 5/16” wall DOM tubing, these control arms and track bar offer superior durability and strength compared to factory and aftermarket components.
  • Johnny Joints for maximum flexibility – Equipped with Johnny Joints at both ends, providing exceptional articulation and vibration dampening for smoother off-road performance.
  • Left- and right-hand threaded adjustability – All components feature left- and right-hand threaded adjusters, allowing for precise on-vehicle axle positioning, pinion angle tuning, and suspension adjustments without removal.
  • Fully adjustable for lifted vehicles – Designed to accommodate 0 to 6 inches of lift, allowing for precise axle centering, pinion angle adjustments, and enhanced suspension control. For lifts beyond 6 inches, contact us for custom solutions.
  • Complete rear-end suspension solution – This kit provides absolute control over axle centering, pinion angles, and suspension geometry, ensuring maximum stability and performance for your lifted Ford Bronco.

Two-Stage Powder Coating for Maximum Protection

To ensure long-lasting durability and corrosion resistance, all components undergo a two-stage powder coating process. A zinc primer base coat provides superior rust prevention, followed by a durable top coat available in 10 custom colors for added protection and personalization.

Proudly Made in the USA

Manufactured in Orem, UT, the Crawl Series Rear Control Arm and Track Bar Kit is built to the highest standards of American craftsmanship. By choosing CORE 4X4, you’re investing in a locally made, high-quality product designed to withstand the most demanding conditions.

Optional Hardware Upgrade

Designed for easy installation using factory hardware. For those dealing with rusted or stubborn bolts, optional Grade 8 hardware kits are available separately for a hassle-free setup.


  • Vehicle Fitment: Ford Bronco 21+ – Designed to improve rear suspension performance, axle alignment, and pinion angle correction for enhanced on-road comfort and off-road capability.

  • CORE Advantage: Provides superior articulation, reduces driveline vibrations, and improves rear-end stability for better traction and handling in both everyday driving and extreme off-road conditions.

  • Adjustability: Fully adjustable to accommodate lifts from 0 to 6 inches, allowing for precise axle re-centering, alignment correction, and suspension fine-tuning. Additional solutions available for lifts beyond 6 inches.

  • Construction: Built from 5/16” wall DOM tubing with Johnny Joints at each end for maximum articulation and durability, ensuring long-lasting performance in demanding 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.

Rear Track Bar Built With 1.5” OD 5/16” Wall DOM. Forged Johnny Joints on both adjustable ends with 1” x 14” TPI - 2.32” 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.

Ford Bronco 21+ Crawl Series Rear Heavy-Duty Adjustable Panhard/Track Bar

Rear Track Bar built with 1.5” OD 5/16” Wall DOM. Forged Johnny Joints on both adjustable ends with 1” x 14” TPI - 2.32” 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%
DR
David Rogers Aug 25, 2025
Google
Ive had the front adjustable control arm kit in bright green for my 1996 ZJ. Ive had the kit for about a year now and i have to say, im extremely impressed, over 1000 miles off-road and roughly 20,000 miles on the highway. These control arm kits for any vehicle built by core 4x4 are well worth the money, just be aware thereight be some minor scatches or chips from shipping ( but who should care about that if you're beating the crap out of em' they way they were built and designed for)
Review photo 1 Review photo 2
CL
Cade Leith Mar 23, 2024
Google
Have full upper/lower CA set on both front and rear axles on a 96 ZJ. These are the rubber bushing sets not joint sets. I have beat the hell out it in the Nevada desert for 2 years and has been great. I don’t go fast but I do articulate suspension a lot. Super solid and haven’t any issues. Just inspected the entire set recently due to some banging under it. Turns out the banging is lower rear shock bushings. Inspected each CA along the way nothing. Aside from dirt and obviously winter roads and what not still in excellent condition, bushings are solid like the day they were installed. I’ll add that I’m about tapped on a short arm at 4.25(less with settle) so the front CA’s get beat on just from that, still they’re like new. Paint is great condition, this set is red. I would definitely buy again. Another plus for me, Utah isn’t local necessarily, but it’s nice to support businesses closer to me.
EC
Eric Cox Jul 26, 2025
Google
Prompt, professional, and courteous service! Quality parts and broad assortment of products to suite your 4x4 needs:)
EL
Eric Labrum May 27, 2025
Google
Best customer service I have ever experienced. They are my go to source do to quality and service
JM
Jason Mitchell Dec 8, 2025
Google
Installed the full kit on my XJ. Ride quality is night and day better than what I had before. The articulation on the trail is insane. These guys know what they are doing. Already recommended Core 4x4 to everyone in my club.
WT
William Turton Nov 23, 2025
Google
Finally a company with a great product and customer service to match. I changed my order last minute from short arms to long arms. The lift is extremely well built. Korbey was awesome! Highly recommend Core 4x4
JO
Jaime Overmyer Nov 23, 2025
Google
Korby was extremely helpful in helping me find the right part for my truck. He was kind, knowledgeable, and patient while I asked a million questions. He also went out of his way to find the right shipping option for me since it’s tricky where I live. I’m looking forward to getting the parts so I can fix my truck and go adventuring again soon!
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.
VK
Victor Keele Sep 24, 2025
Google
Great customer service. I got my front upper and lower control arms and hardware on Friday afternoon. It didn’t come with instructions so I called Core 4X4 and they immediately e mailed me the instructions. Also, the kit I got had the spacers missing so I called. It was late Friday by thus time but they took care of the issue first thing Monday morning and I got the spacers on Tuesday. Great company.
Review photo 1 Review photo 2
ZA
Zen Asher Mar 23, 2025
Google
The quality and durability of the arms are the best. They are super heavy duty. And lifetime warranty is crazy

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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