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Heavy-Duty Rear Upper A-Arm Spacer

Jeep Grand Cherokee WJ 99-04 Heavy-Duty Rear Upper A-Arm Spacer
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89.20 89.2 USD 89.20

89.20

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Order today — ships within 1–3 business days
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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
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COLOR 11 colors — pick yours
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Heavy-Duty Rear Upper A-Arm Spacer

Jeep Grand Cherokee WJ 99-04 Heavy-Duty Rear Upper A-Arm Spacer
SKU: J-WJ-AAS1
Pick your vehicle to confirm fit

89.20 89.2 USD 89.20

89.20

COLOR 11 colors
Black Blue Charcoal Green Light Green Orange Purple Red White Yellow Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.
  • 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.
  • 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

Lifetime warranty on all non-wear items Made In USA

1–3 day build time + Shipping

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

Key Features Benefits

  • Vehicle Fitment: Jeep Grand Cherokee WJ (1999-2004) – Corrects driveline angles and optimizes rear upper control arm geometry after a lift.
  • Core Advantage – Raises the rear axle mounting point to improve suspension articulation, reducing stress on factory components.
  • Adjustability – Designed for lifts between 2” and 4”. For lifts over 4”, we recommend our Adjustable A-Arm with Axle Bracket (CMP-J-WJ-AA1).
  • Construction – Precision laser-cut from 1/4" steel plate, professionally welded for superior strength and durability.

Optimized Suspension Geometry

Installing a lift kit on your WJ can alter driveline and rear upper control arm angles, leading to poor suspension performance. This A-Arm Spacer raises the mounting point on the rear axle, restoring proper geometry to maintain stability, articulation, and overall drivability.

Two-Stage Powder Coating

Finished with our signature two-stage powder coating process, this spacer is built to resist corrosion and maintain a clean, professional appearance, even in harsh conditions.

Made in the USA

Proudly manufactured in Orem, Utah, this A-Arm Spacer meets the highest standards of craftsmanship, supporting American manufacturing and quality control.

Conclusion

The WJ A-Arm Spacer (J-WJ-AAS1) is an essential upgrade for Jeep Grand Cherokee WJ owners looking to improve handling, correct driveline angles, and enhance durability after a lift. Upgrade today and experience better suspension performance on and off the trail!


Make Model Submodel Years
Jeep Grand Cherokee 1999 - 2004

Vehicle Jeep Grand Cherokee WJ (99–04)
Brand CORE 4X4
Color Black or Blue or Charcoal or Green or Light Green 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.
Placement on Vehicle Rear Upper, 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.

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Reviews of Core 4x4

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5.0
132 reviews
5
97%
4
2%
3
0%
2
1%
1
0%
JS
Jon Stempien May 27, 2025
Google
Big thanks to Corby at core 4 x 4 outstanding customer service I like to thank them or 4 x 4 for helping me Well-made product in the United States recommend core 4 x 4 for all jeep Owners that like the four wheel
GH
Gary Haag Aug 25, 2025
Google
Ordered a set of Core 4x4 control arms for my 2006 Jeep TJ. These are some heavy duty quality control arms. Can't wait to get them installed. Great customer service too!
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
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Don Jul 26, 2025
Google
Great shop, great parts and great service. You want to buy off this company and company’s like this!!!! Wish we had more companies as good as this one!! Thank you
C
Chris Oct 24, 2025
Google
Great product for a good price. Customer service is top notch, I had an issue which was self cause and Core 4x4 helped me out even though it was my own fault. Would definitely recommend and use them again.
RH
R and H H Oct 24, 2025
Google
Top notch company. Mechanic lost bolts that clamp upper control arms. Korby sent out spare bolts no charge. Best customer service I’ve come across in a long time. Only suspension brand I’ll ever use.
BW
Brian Wadsworth Jun 26, 2025
Google
Amazing product! Shipping was quick, packaging was great and support was outstanding!!
CT
Canon TeSelle Jun 26, 2025
Google
Great Experience. I wanted to make changes to my order and Korby was more than willing to work with me to get everything corrected. Hope to deal with these guys again in the future.
BB
Brayden Brockey Mar 23, 2024
Google
Got a set of upper control arms for my xj, really impressed with the quality
Review photo 1
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Eric Hernandez (savagefit) May 27, 2025
Google
The whole process was quick and painless. The products are top tier and when I reached out them for package update info, Korby Linscomb was very responsive, and got me the answers I needed the same day. Even when I emailed back to some additional info, he sent what I was looking for that same day. I love core 4x4 and will be giving them my business from now on.

Specifications

Color Black, Blue, Charcoal, Green, Light Green, Orange, Purple, Red, White, Yellow, Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed.
Vehicle Jeep Grand Cherokee WJ (99–04)
Brand CORE 4X4
Note to Core4x4: -
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