Ford Bronco 21+ 5pc Crawl Series Rear Adjustable Control Arm, Track Bar Kit

Name: Ford Bronco 21+ 5pc Crawl Series Rear Adjustable Control Arm, Track Bar Kit
Brand: CORE 4X4
SKU: CRL-F-BR-2021-K5
Price: 1312.45 USD
Availability: InStock

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SKU: CRL-F-BR-2021-K5 ★★★★★ (132 reviews)

$ 1,181.21 1181.21 USD $ 1,312.45

$ 1,312.45

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Lifetime warranty Fitment guarantee Ships from Orem, UT 4–8 hr install

Ford Bronco 21+ 5pc Crawl Series Rear Adjustable Control Arm, Track Bar Kit

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COLOR 11 colors — pick yours

	Trail-Ready $937	Trail Domination $1,181
Articulation	65°	95°
Joint Type	Forged Johnny Joint	Forged Johnny Joint
Tubing	1.75" OD lowers / 1.50" OD uppers · 5/16" wall DOM	1.75" OD lowers / 1.50" OD uppers · 5/16" wall DOM
Maintenance	Periodic greasing	Periodic greasing
Warranty	Lifetime	Lifetime
	SELECT CAMP →	SELECT CRAWL →

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

This kit includes 3 components, each built and powder-coated in-house.

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.

Master Rebuild kit for CRL-F-BR-2021-K5 $ 210.00

Master Rebuild kit for CRL-F-BR-2021-RL2 $ 84.00

Master Rebuild kit for CRL-F-BR-2021-RU2 $ 84.00

Master Rebuild kit for CRL-F-BR-2021-RTB1 $ 42.00

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

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.

Reviews of Core 4x4

See all on Google

5.0

★ ★ ★ ★ ★

132 reviews

5 ★

97%

4 ★

3 ★

2 ★

1 ★

Jaime Overmyer Nov 23, 2025

★ ★ ★ ★ ★

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!

MIKE (Mike the Mechanic) Jul 26, 2025

★ ★ ★ ★ ★

Amazing company and customer service!!!! I messed up on my order and the fixed it immediately. Would definitely recommend them. Can't wait to hit the trails with their product.

Cade Leith Mar 23, 2024

★ ★ ★ ★ ★

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.

Harold Kruder Mar 23, 2024

★ ★ ★ ★ ★

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.

Dastrup Auto Mar 25, 2019

★ ★ ★ ★ ★

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!

Norb Pranger Oct 24, 2025

★ ★ ★ ★ ★

Not sure where to start, Products or Service or Warranty. Products: I found Core4x4 through a very respected YouTuber in the Jeeping community. I purchased an entire set of Core4x4 Control Arms three years ago and have beat the daylights out of them and they are still in great condition. Now, I purchased another Jeep, this time for my daughter and bought yet another set of Control Arms because I know that these things can take a beating and stand up to it. I plan on replacing more parts on this TJ and my JL and will continue to buy from Core4x4. Service: This isn't some huge name conglomerate that treats you like you're just another customer. They are quick with responses and will always make things right should something be a problem. Oh and the quickness in which they ship their products is unmatched. I bought these CAs for my TJ on Thursday, I received them on Monday. Most other manufacturers will tell you weeks, they had them to me in 2 shipping days. Warranty: Seriously, a lifetime warranty? Yes please. Nothing more to say. I can't say enough about how great of a company this is. I've even spoken to the owner through email a few years back on some questions that I had. Support small American built businesses. P.S. Core 4x4, feel free to make me an ambassador and send me some swag :) .

Paul Melancon Aug 25, 2025

★ ★ ★ ★ ★

Ordered a control arm and track bar kit for my WJ from Core 4x4 on Monday 7/28 and received it today, Friday 8/1. Im not a state or two away, im in CT aka the other side of the country. Communication is phenominal, emails were responded too in an hour or less. Parts arrived well packed, not damaged, and are great quality for my needs. There arent many companies left that service customers as well as Core 4x4 and i wont hesitate to check them out again if i need something else. Well done!

Victor Keele Sep 24, 2025

★ ★ ★ ★ ★

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.

David Nov 23, 2025

★ ★ ★ ★ ★

First of I just want to say Great customer service korby Has helped me from the start and has not let me down! Reached out to him again today and he was able to warranty some parts out for me. As far as the quality of the parts.. excellent! The build quality is great. I can definitely tell a Difference from the cheap oem rear control arms to these and the pan hard bar. Color, From what I can tell it’s super durable been through a few mud holes on top of the daily road grime and after a quick wipe they still pop! Overall I recommend. Customer service is everything for me and it’s definitely there at Core 4x4.

Adam M Sep 24, 2025

★ ★ ★ ★ ★

First time buying from Korby @ Core 4x4 and it’s being nothing short of a great experience. I bought the non adjustable Trail kit for my 5th Gen Ram 1500 with a 2” lift. The welds look great, nice powder coat finish and quality bushing. Had some trouble fitting the grease nipples due to the powder coating but a thread tap would fix that. They fit easily and perform great. I felt the improvement straight away. No more wheel hop on hard acceleration which was my main reason for the purchase. I was missing some smaller bushings needed for the 5th Gen and Korby’s custom service was on point, with responsive emails and mailing out the missing parts straight away. Very happy with their products and customer service. Highly recommended company👌🏽

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