This kit includes 6 components, each built and powder-coated in-house.
Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Front Lower Adjustable Control Arms
View Component →
Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Front Upper Adjustable Control Arms
View Component →
Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Rear Lower Adjustable Control Arms
View Component →
Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Rear Upper Adjustable Control Arms
View Component →
Jeep Wrangler JK / JKU 07-18 Crawl Series Front Heavy-Duty Adjustable Track Bar
View Component →
Jeep Wrangler JK / JKU 07-18 Crawl Series Rear Heavy-Duty Adjustable Track Bar
View Component →Take Your Jeep Wrangler JK’s Suspension to the Next Level
Upgrade your Jeep Wrangler JK’s suspension with the Crawl Series Complete Kit, designed for extreme off-road enthusiasts and daily drivers alike. This premium suspension upgrade combines eight adjustable control arms and front and rear track bars to deliver superior flexibility, durability, and articulation. Whether tackling technical trails or cruising on the highway, this kit offers unmatched control, comfort, and confidence for any driving condition.
Key Features and Benefits
- Comprehensive Suspension Solution – This kit includes everything needed for a complete suspension overhaul, improving alignment, axle centering, and vehicle stability.
- Heavy-Duty Construction – Built from DOM tubing with a 5/16” wall thickness, featuring 1.5” OD upper control arms and 1.75” OD lower control arms for exceptional strength and durability.
- Johnny Joints for Maximum Articulation – Equipped with Johnny Joints at both ends of all control arms and track bars, delivering superior flexibility, articulation, and smooth ride quality.
- Enhanced Adjustability for Lifted Vehicles – Fully adjustable for lifts from 0 to 6 inches, allowing precise alignment correction and optimized suspension geometry. Custom solutions available for lifts beyond 6 inches.
Durable Two-Stage Powder Coating
Each component undergoes a zinc primer base coat for corrosion resistance, followed by a top coat available in 10 colors for a personalized look.
Optional Hardware Upgrade
Designed for straightforward installation using factory hardware, with optional Grade 8 hardware kits available for rusted or stubborn bolts.
Vehicle Fitment: Jeep Wrangler JK 07-18 – Delivers a complete suspension upgrade for improved alignment, stability, and off-road capability.
CORE Advantage: Includes 8 adjustable control arms and both front and rear track bars with Johnny Joints for unmatched articulation, handling, and ride comfort.
Adjustability: Fully adjustable for 0–6” lifts, ensuring precise axle re-centering, caster correction, and optimized suspension geometry.
Construction: Built from heavy-duty DOM tubing with a 5/16” wall, powder-coated for superior strength, durability, and long-term corrosion resistance.
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 Joint 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. Forged 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 Joint 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 Joint on the adjustable end with 1” x 14 TPI - 2.32” long threads.
| Make | Model | Submodel | Years |
|---|---|---|---|
| Jeep | Wrangler | 2007 - 2018 |
Each rebuild kit includes all necessary components to replace and restore wearable parts.
Construction & Materials
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 Lowers built with Forged Johnny Joints on the adjustable end and a Welded Johnny Joints on the fixed end 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.
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.
| Vehicle | Jeep Wrangler JK / JKU (07–18) |
| 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. |
| Lift Size | 0" — 6" or 6"+ |
| Hardware | No Hardware or Complete Kit |
| Series | Crawl Series |
| 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.
Reviews of Core 4x4
Suggested Products
Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Front Lower Adjustable Control Arms
$ 493.45
Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Front Upper Adjustable Control Arms
$ 309.70
Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Rear Lower Adjustable Control Arms
$ 482.95
Jeep Wrangler JK / JKU 07-18 2pc Crawl Series Rear Upper Adjustable Control Arms
$ 461.95
Jeep Wrangler JK / JKU 07-18 Crawl Series Front Heavy-Duty Adjustable Track Bar
$ 330.70
Jeep Wrangler JK / JKU 07-18 Crawl Series Rear Heavy-Duty Adjustable Track Bar
$ 346.45Accessories & Add-ons
Jeep JK Fox 2.0 Performance Shock Kit
$ 874.99
Quicker Disconnect Sway Bar Links | 0"-2" Lift | Wrangler JK
$ 176.95
Quicker Disconnect Sway Bar Links | 2.5"-6.0" Lift | Wrangler JK
$ 176.95
Adjustable Rear Sway Bar End Links | Wrangler JK and JL | 0-6"
$ 90.95
Apex Chassis Jeep Wrangler JK & Grand Cherokee HD Ball Joint Kit Includes: 2 Upper & 2 Lower
$ 240.00Specifications
| 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 | 0" — 6", 6"+ |
| Hardware | No Hardware, Complete Kit |
| Vehicle | Jeep Wrangler JK / JKU (07–18) |
| Brand | CORE 4X4 |
| Series | Crawl Series |
| Note to Core4x4: | - |
| Tags | |
|---|---|
| Tags | |
