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16pc Kit
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://dev.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%
BS
Bailey Smith Mar 23, 2025
★ ★ ★ ★ ★ Google
Core 4x4 excels with precision and service and keeps nothing else higher in mind. Everyone I've met at the company is very honest and down to earth, 10/10 would recommend.
RH
Rex Hodges Jun 26, 2025
★ ★ ★ ★ ★ Google
After ordering an upper and lower adjustable control arm kit manufactured by CORE 4X4 from a jeep parts distributor who's intials are E.T., they came with 3 of the threaded ends missing. After over 2 months of phone calls and emails to this E.T. company nothing was resolved. I finally decided to call CORE 4X4 myself and tell them my dilemma. I spoke with a very personable and professional gentleman named Korby, who is one of CORE 4X4's representatives, after a brief discussion of what I went thru he simply asked me for a picture and some measurements and the items I was missing and asked if I could cover ONLY the cost of shipping and I had my missing parts in exactly 1 weeks time. This company not only builds all it's parts in the U.S.A., they stand behind their products with great customer service and life time warranty. My experience with this company and their Rep Korby was fantastic. I would definitely recommend CORE 4X4 to anyone who needs parts for any 4x4 projects. You just can't beat their quality and service. Rex Hodges Valparaiso, Indiana
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
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.
L
luke Mar 24, 2021
★ ★ ★ ★ ★ Google
Excellent quality product and service. My l lower control arms broke and within the same day core 4x4 hooked me up with tier 2 arms and with the color I wanted. My Jeep rides better and has been solid for several months so far. 10/10 would recommend their products to anyone.
D
DSI Jul 26, 2025
★ ★ ★ ★ ★ Google
Great products with excellent customer service after the sale
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
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 ! ! !
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!
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.

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 ›