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SKU: CRL-J-JL-K16 ★★★★★ (132 reviews)
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$ 3,354.71 3354.71 USD $ 3,727.45

$ 3,727.45

(Save 10%)

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Order today — ships by Mon, Jun 1
Salt Lake City, UT change
Order by 3:00 PM MT today — we'll start tomorrow
See full timeline
Lifetime warranty Fitment guarantee Ships from Orem, UT 4–8 hr install
Free mounting hardware included — a $100 value
COLOR 11 colors — pick yours
https://core4x4.com/web/image/product.template/1665/image_1920?unique=982bc5a

16pc Crawl Series Adjustable Control Arm, Track Bar, Steering, End Link Kit

SKU: CRL-J-JL-K16
Pick your vehicle to confirm fit
Google 5.0 ★★★★★ (132 reviews)

$ 3,354.71 3354.71 USD $ 3,727.45

$ 3,727.45

(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.
  • Lift Size
    Choose your current front lift height. Measure from center of wheel to fender if unsure.
  • Hardware
    Choose upgraded hardware if your factory hardware is worn, damaged, or missing.
  • Drag Link Orientation
    Select flipped drag link only if your steering has already been converted to over-the-knuckle.
  • Stabilizer Clamp
    Match your steering stabilizer mounting style. Standard clamp, hydraulic assist, or tie rod clamp.
  • Note to Core4x4:

Select Color to see price and add to cart.

Order today — ships by Mon, Jun 1
Salt Lake City, UT change
Order by 3:00 PM MT today — we'll start tomorrow
See full timeline
Free mounting hardware included — a $100 value

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

The Ultimate All-Inclusive Suspension and Steering Solution

Transform your Jeep Wrangler JL with the Crawl Series Total Suspension Control Kit (CRL-J-JL-K16). This comprehensive system delivers unmatched control, durability, and performance, combining all the essential components needed for a complete suspension overhaul. From superior axle alignment to precise steering geometry and enhanced off-road articulation, this kit is designed to elevate your Jeep’s capabilities on and off the trail. Simply pair it with your choice of springs and shocks to achieve a full suspension revamp or lift kit.

Key Features and Benefits

  • Complete suspension overhaul – Includes 8 adjustable control arms, front and rear track bars, and front and rear sway bar end links, ensuring precise axle alignment, optimal suspension geometry, and enhanced handling for lifted Jeeps.
  • Heavy-duty aluminum steering kit – The 2.5-ton steering kit, crafted from 2-inch 7075 aluminum with memory properties, absorbs impacts and returns to its original shape, delivering superior strength and reliability in extreme off-road conditions.
  • Improved stability and articulation – Johnny Joints at both ends of the control arms, track bars, and end links provide unmatched off-road articulation and smooth, bind-free movement while maintaining on-road stability and comfort.
  • Tailored for lifts from 0 to 6 inches – Fully adjustable components accommodate lifts from 0 to 6 inches, allowing for precise alignment correction, axle centering, and optimal caster and pinion angle adjustments. For custom setups over 6 inches, additional solutions are available upon request.

Build the Ultimate Lift Kit

Combine this kit with your preferred springs and shocks to create a custom suspension system that delivers unmatched performance, durability, and off-road capability.

Two-Stage Powder Coating

Each component undergoes a rigorous two-stage powder coating process. A zinc primer base provides exceptional corrosion resistance, while the durable topcoat—available in 10 customizable colors—adds extra protection and a personalized finish to your Jeep.

Made in the USA

Proudly manufactured in Orem, UT, the Crawl Series Total Suspension Control Kit reflects CORE 4X4’s dedication to American craftsmanship. By managing production in-house, we ensure stringent quality standards and support local industries while offering competitive pricing.

Optional Hardware Upgrade

Designed for straightforward installation, the kit uses factory hardware. Optional Grade 8 hardware kits are available separately for Jeeps with rusted or stubborn bolts, ensuring a smooth and hassle-free process.


  • Vehicle Fitment: Jeep Wrangler JL 18+ – A full suspension and steering upgrade for precise handling, stability, and off-road capability.

  • CORE Advantage: Provides absolute control over axle positioning, pinion angle, caster adjustments, and steering geometry for unmatched ride quality.

  • Adjustability: Fully adjustable for 0–6” lifts, allowing precise axle re-centering, optimized suspension geometry, and fine-tuned steering responsiveness.

  • Construction: Built from heavy-duty DOM tubing with 5/16” walls, featuring 1.75” OD lowers, 1.5” OD uppers, and a 2.5-ton 7075 aluminum steering kit for maximum strength.

  • 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

Front Lower control arm built with 1.75” OD 5/16” Wall DOM. Welded Johnny Joint on the fixed end and a Forged Johnny Joint on the adjustable end with 1.25” x 12 TPI - 2.625” long threads.

Front Upper control arm built with 1.5” OD 5/16” Wall DOM. Welded u-bracket on the welded end and a Forged Johnny Joints on the adjustable end with 1” x 14” TPI - 2.32” long threads.

Rear Lower control arm built with 1.75” OD 5/16” Wall DOM. Forded Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.625” long threads.

Rear Upper control arm 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.

Front Track Bar built with 1.5” OD 5/16” Wall DOM. Welded Johnny Joint on the fixed end and a Forged Johnny Joints on the adjustable end with 1” x 14 TPI - 2.32” long threads.

Rear Track Bar built with 1.5” OD 5/16” Wall DOM. Welded Johnny Joint on the fixed end and a Forged Johnny Joints on the adjustable end with 1” x 14 TPI - 2.32” long threads.

Front End Links built with .75” Cold Rolled Steel. Welded Johnny Joints on both fixed ends.

Rear End Links built with .75” Cold Rolled Steel. Welded Johnny Joints on both fixed ends.

Tie Rod and Drag Link made from 2" 7075 Aluminum. Tie Rod and Drag Link use Apex Chassis Forged Rod Ends.

Make Model Submodel Years
Jeep Wrangler 2018 - Present

Construction & Materials

Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Front Fixed Length End Links

Front End Links built with .75” Cold Rolled Steel. Welded Johnny Joints on both fixed ends.

Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Front Lower Adjustable Control Arms

Front Lower control arm built with 1.75” OD 5/16” Wall DOM. Welded Johnny Joint on the fixed end and a Forged Johnny Joint on the adjustable end with 1.25” x 12 TPI - 2.625” long threads.

Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Front Upper Adjustable Control Arms

Front Upper control arm built with 1.5” OD 5/16” Wall DOM. Welded u-bracket on the welded end and a Forged Johnny Joints on the adjustable end with 1” x 14” TPI - 2.32” long threads.

Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Rear Fixed Length End Links

Rear End Links built with .75” Cold Rolled Steel. Welded Johnny Joints on both fixed ends.

Jeep Wrangler JL / JLU 18+ 2pc Crawl Series Rear Lower Adjustable Control Arms

Rear Lower control arm built with 1.75” OD 5/16” Wall DOM. Forded Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.625” long threads.

Jeep Wrangler JL / JLU 18+ 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.

Jeep Wrangler JL / JLU 18+ 2pc Heavy-Duty Tie Rod, Drag Link Steering Kit

Tie Rod and Drag Link made from 2" 7075 Aluminum. Tie Rod and Drag Link use Apex Chassis Forged Rod Ends.

Jeep Wrangler JL / JLU 18+ Crawl Series Front Heavy-Duty Adjustable Track Bar

Front Track Bar built with 1.5” OD 5/16” Wall DOM. Welded Johnny Joint on the fixed end and a Forged Johnny Joints on the adjustable end with 1” x 14 TPI - 2.32” long threads.

Jeep Wrangler JL / JLU 18+ Crawl Series Rear Heavy-Duty Adjustable Track Bar

Rear Track Bar built with 1.5” OD 5/16” Wall DOM. Welded Johnny Joint on the fixed end and a Forged Johnny Joints on the adjustable end with 1” x 14 TPI - 2.32” long threads.

Vehicle Jeep Wrangler JL / JLU (18–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
Lift Size Stock Height or Lifted 1" or Lifted 2" or Lifted 3" or Lifted 4" or Lifted 5" or Lifted 6" or Lifted 7" or Lifted 8" or Custom length or 1/2 sizes (put desired length in the Order Notes)
Hardware No Hardware or Complete Kit
Drag Link Orientation Factory Mounting (under the knuckle) or Drag Link Flip w/ Tapered Sleeve And Drill Bit (over the knuckle)
Stabilizer Clamp Standard Clamp or Hydraulic Assist Clamp
Placement on Vehicle Front Upper, Front Lower, Rear Upper, Rear Lower, Front, 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%
MT
Ma TheMeatLoaf Mar 23, 2024
★ ★ ★ ★ ★ Google
Their website estimated 2 days to get my parts but actually took 11. No communication to let me know what’s going on. Parts were missing. Some days they answer questions, some they don’t. Didn’t let me know I’d have to alter stock bolts to fit their parts. All around just seems like they don’t care.
SC
Singer Heating and Cooling Mar 25, 2018
★ ★ ★ ★ ★ Google
These guys are great. You can get them on the phone for support. This important and is not always the case with other custom parts builders. Their control arms are bomb proof and offer plenty of options. You can get real genuine Currie Johnny joints without paying the price for Currie arms.
A
Aaron Mar 23, 2024
★ ★ ★ ★ ★ Google
I have recently come to know Core 4x4 when I purchased a Jeep XJ and was looking for a place that had dedicated XJ suspension and components. Here is what makes them different than most other shops. All of their components are top shelf quality and they back it up if you break any of it. I was able to see their shop when I picked up an order locally and was impressed with their attention to detail and how they assemble and powder coat each part. I had an issue with a shackle and needed the threaded shaft to be shorter. I called in and talked to Kaden and he told me to come by and they would shorten it for me. When I got there, Kaden and Spencer (the owner) met me and talked about options and proceeded to make the right adjustments to fit my XJ. Told me if anything changes in the future and I need additional length, they would take care of me. So what really sets them apart from others is their Customer Service. Try calling in to any other Jeep suspension or part shop and see how they treat you. Been there - done that. Will continue to do business with Core and their team. Getting that kind of service for just a shackle has me thinking I may need to replace my JT components with Core's. Thanks Guys for being helpful good humans!
OK
oleg k Nov 23, 2025
★ ★ ★ ★ ★ Google
I recently ordered a set of control arms from Core 4x4, and the entire experience was absolutely top-notch from start to finish. The ordering process was smooth, the parts arrived quickly, and the control arms themselves are extremely high quality—solid construction, great finish, and clearly built to last. I also want to give a special shout-out to Korby, the guy I spoke with during the process. His customer service was amazing. He went above and beyond to make sure I got exactly what I needed, answered all my questions, and made the whole experience stress-free. You don’t see service like that very often these days. If you’re looking for high-quality suspension components backed by truly exceptional customer service, I highly recommend Core 4x4. I’ll definitely be buying from them again.
MH
mark hinz Mar 2, 2026
★ ★ ★ ★ ★ Google
Went above and beyond to get the parts we needed to complete our customers build for Moab Easter safari cant thank you enough for all your hard work and efforts Thank you and look forward to working with you in the near future
JM
Jay Miller Jul 26, 2025
★ ★ ★ ★ ★ Google
I purchased a upper and lower set of control arms from core 4x4 they came early then expected and seem to be very nice quality I ran into a complication installing them and emailed them my question I was expecting to get the response maybe the next day because it was after hours I got a response in about a few minutes which allowed me to finish the project that day I super appreciate that, the products are good strong lifetime warranty and their customer service is top notch
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
MG
Morgan Griffith Mar 25, 2018
★ ★ ★ ★ ★ Google
I met a couple of the Core 4x4 guys at the Salt Lake Offroad Expo and decided to try them out after noticing one of my control arm bushings was disintegrated. I called to discuss parts on Thursday and I was leaving for a trip on Saturday. These guys built my control arms and had them ready to be picked up Friday, 24 hours later. The parts seem to be great quality and they charged me nothing extra to have them painted. These guys were extremely helpful and without them my trip probably would have been cancelled. looking forward to testing out the arms on my next trip to Moab.
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
AH
Abbey Hiett Mar 25, 2019
★ ★ ★ ★ ★ Google
Company finally made things right

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.
Lift Size Stock Height, Lifted 1", Lifted 2", Lifted 3", Lifted 4", Lifted 5", Lifted 6", Lifted 7", Lifted 8", Custom length or 1/2 sizes (put desired length in the Order Notes)
Hardware No Hardware, Complete Kit
Drag Link Orientation Factory Mounting (under the knuckle), Drag Link Flip w/ Tapered Sleeve And Drill Bit (over the knuckle)
Stabilizer Clamp Standard Clamp, Hydraulic Assist Clamp
Vehicle Jeep Wrangler JL / JLU (18–Present)
Brand CORE 4X4
Series Crawl Series
Note to Core4x4: -
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ARMOR & BODY Choose vehicle for fit
Frame Brackets Coming Soon Mounting + relocation brackets › Panhard Mount Coming Soon Track bar relocation mount › Axle Truss Weld-on axle reinforcement 2 › Rear Bumpers Heavy-duty rear bumpers 1 › Frame Stiffener Coming Soon Frame reinforcement plates for big lifts › Skid Plates Coming Soon Engine · Oil pan · Muffler · Gas tank › Exterior Accessories Bumper guards · Cargo racks · Light mounts 8 › Armor Axle trusses · Diff covers · Crossmembers 22 ›
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Drivetrain Coming Soon Axles · Gearing · Driveshafts ›