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Jeep Grand Cherokee WJ 99-04 Heavy-Duty Rear Upper A-Arm Spacer
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73.14 73.14 USD 89.20

89.20

(Save 18%)

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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
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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

73.14 73.14 USD 89.20

89.20

(Save 18%)

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
  • Brand
  • Color
  • 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

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
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Sebastian Oct 24, 2025
Google
Great products they sell, got a crawl series long arm kit for my xj and it has held up quite nice, they are beefy, and for what ever reason they fail it has a great warranty with a customer service to match, when someone asks what control arm kit to buy I always recommend core 4x4
HK
Harold Kruder Mar 23, 2024
Google
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.
BZ
Brandon Zeiders Dec 23, 2025
Google
I ordered the jeep xj long arm lift kit. Control arms showed up first they turned out amazing!! Had some issues with the powder coating on the cross member and sent korby and the team at core4x4 an email. They got right on making me another cross member and sending it out. I appreciate all the help they've given me along the way. Very fast response thru emails. Build quality seems to be pretty dang nice!! Can't wait to install it and enjoy it!
EL
Eric Labrum May 27, 2025
Google
Best customer service I have ever experienced. They are my go to source do to quality and service
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.
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.
CM
Cameron Masters Mar 24, 2023
Google
Absolutely incredible family owned business. I asked to pick up my order since I’m local and they came in on a weekend to accommodate. Had to make some adjustments to parts and took the time to make sure it was perfect. Parts are incredible quality. If you have a Jeep, do not hesitate to support this local business.
ZA
Zen Asher Mar 23, 2025
Google
The quality and durability of the arms are the best. They are super heavy duty. And lifetime warranty is crazy
RC
Robert C May 27, 2025
Google
Fantastic products! Outstanding performance!! Absolutely the best customer service!! You will not be disappointed!
AH
Abbey Hiett Mar 25, 2019
Google
Company finally made things right

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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