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SKU: CRS-J-WK-RS4 ★★★★★ (132 reviews)
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LIFETIME WARRANTY
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FITS YOUR EXACT VEHICLE
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SHIPS IN 1–3 DAYS
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MADE IN UTAH, USA
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$ 307.87 307.87 USD $ 362.20

$ 362.20

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🔧 Built to order · Ships in 1–3 business days

COLOR 11 colors — pick yours
https://jerdev.core4x4.com/web/image/product.template/1683/image_1920?unique=a7bad1a
SKU: CRS-J-WK-RS4
Fits: 2005 - 2010 Jeep Grand Cherokee WK Add vehicle
Add Vehicle Google 5.0 ★★★★★ (132 reviews)

$ 307.87 307.87 USD $ 362.20

$ 362.20

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.
  • Hardware
    Choose upgraded hardware if your factory hardware is worn, damaged, or missing.
  • Series
    Cruise: daily driving and light off-road. Camp: overlanding. Crawl: aggressive rock crawling.
  • Note to Core4x4:

Select Color to see price and add to cart.

WHAT’S INCLUDED
4
Upper Control Arms
4
Lower Control Arms
2
Front Track Bars
2
Rear Track Bars
4
End Links

4–8 hr install Moderate 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
Ships in 3 Days From our UT facility
Fully Adjustable 0-6" of lift
3 X-Series Options Only Core 4x4

Why Builders Choose CORE 4X4

Warranty facts, not marketing language.

vs. MetalCloak

Their “lifetime” language refers to their service model. Actual parts warranty: 1 year. Ours: lifetime.

vs. Teraflex

Skip a maintenance interval? Their warranty voids. Ours doesn’t.

vs. Clayton Off Road

Clayton warrants their Johnny Joints for 90 days. We cover ours for life.

Performance and Comfort

Upgrade your on-road ride quality and off-road capability with the Cruise Series Rear Control Arm Set, engineered specifically for Jeep Grand Cherokee WK models (2005-2010). This set includes both our Rear Upper Control Arms and Rear Lower Control Arms, providing a major performance boost over factory components.

Expect increased durability, smoother handling, and enhanced suspension responsiveness with this upgrade.

What’s Included in the Kit?

  • Pair of Rear Upper Control Arms (CRS-J-WK-RU2)
  • Pair of Rear Lower Control Arms (CRS-J-WK-RL2)

Key Features and Benefits

  • Heavy-Duty Steel Construction – Delivers superior strength and longevity compared to stock components.
  • Adjustable for Precise Suspension Tuning – Corrects pinion angles and recenters the rear axle, accommodating lifts from 0 to 6 inches.
  • Tapered Polyurethane Bushings – Enhances ride comfort, minimizes road noise, and reduces harshness, outperforming standard rubber bushings.
  • Greaseable and Rebuildable Design – Extends service life by allowing for easy maintenance and bushing replacement.
  • Recommended Pairing – For a complete rear suspension upgrade, pair with the Cruise Series Rear Track Bar (CRS-J-WK-RTB1) to fully optimize rear axle stability and alignment.

Reduced Noise, Vibration, and Harshness (NVH)

Our Cruise Series polyurethane bushings significantly reduce road noise, vibrations, and harshness, creating a quieter and smoother ride both on and off the road.

The greaseable and rebuildable design ensures long-term durability, making this kit a cost-effective solution for performance and comfort.

Two-Stage Powder Coating for Maximum Durability

To withstand harsh environments and prevent corrosion, all components undergo a two-stage powder coating process: Zinc primer base coat for superior rust protection. Durable top coat, available in 10 color options, for added resilience and customization.

Made in the USA

Proudly manufactured in Orem, UT, using high-quality, locally sourced materials.

Optional Hardware Upgrade

  • Designed for easy installation using factory hardware.
  • If you’re dealing with rusted or stubborn bolts, we offer optional Grade 8 hardware kits, available separately, to ensure a seamless installation.

In Conclusion

Upgrading to the Cruise Series Rear Control Arm Set means enhanced durability, precise axle alignment, and a smoother ride.

For a fully optimized rear suspension, pair with our Cruise Series Rear Track Bar (CRS-J-WK-RTB1) and experience improved handling, reduced vibrations, and long-term reliability.

Upgrade today and take full control of your Jeep’s rear suspension performance!

 

Make Model Submodel Years
Jeep Grand Cherokee 2005 - 2010

Each rebuild kit includes all necessary components to replace and restore wearable parts.

Master Rebuild kit for CRS-J-WK-RS4 $ 120.00
Master Rebuild kit for CRS-J-WK-RL2 $ 60.00
Master Rebuild kit for CRS-J-WK-RU2 $ 60.00

Vehicle Jeep Grand Cherokee WK (05–10)
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.
Hardware No Hardware or Complete Kit
Series Cruise Series

Select your lift size in Step 1 — the kit ships with the correct geometry for that height. If you’re running a non-standard setup, call us before ordering and we’ll confirm compatibility.

Death wobble is a geometry problem, not just worn parts. Cruise Series corrects caster angle and eliminates the flex points that let shimmy start. Replacing one part at a time delays the fix — this replaces the geometry.

Yes, if you’ve done a lift kit before. Full-day project. Watch the complete JT install walkthrough on our YouTube channel — most owners wrap it in a day. Any off-road shop can run it if you’d rather have it done.

Any non-wear component fails — we replace it. No mileage cap. No maintenance intervals to track. No fine print about voiding if you miss a service. Lifetime means lifetime.

Teraflex’s lifetime warranty voids if you miss a maintenance interval. MetalCloak’s actual parts warranty is 12 months — their “lifetime” language refers to their service program. No conditions here.

See It Installed

Install videos and build guides on our YouTube channel.

Watch more installs on YouTube
Google

Reviews from Google

See all on Google
5.0
★ ★ ★ ★ ★
132 reviews
5 ★
97%
4 ★
2%
3 ★
0%
2 ★
1%
1 ★
0%
TM
T Mac Mar 23, 2026
★ ★ ★ ★ ★ Google
CORE 4X4 Company produces/manufactures exceptional products. My rear upper and lower control arms and rear track bar were powder coated custom Fox “Shock Orange” for my 2024 Bronco Wildtrak. OEM looks minimal compared to the CORE 4X4 control arms. Plus they’re adjustable, serviceable and rebuildable. Shipment was very fast and packaging used custom foam wrapped around the arms and heavy duty boxes. Not even UPS could damage. Korby L. was great to work with and responded quickly with emails and product information. Great products. Great people from the State of Utah. All Made in the USA. 5 Stars!!!
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.
B
Ben Mar 24, 2021
★ ★ ★ ★ ★ Google
2001 Wrangler TJ- i have purchased all front/rear upper/lower control arms. Front track bar and rear track bar. Quality is excellent and extremely durable you can tell its built to last. Bent a bolt on the front track bar and called and spoke with Spence. He immediately sent me out new hardware plus some! Product is amazing but what really separates companies apart is their service and these guys are second to none. Thank you all!
AM
Adam M Sep 24, 2025
★ ★ ★ ★ ★ Google
First time buying from Korby @ Core 4x4 and it’s being nothing short of a great experience. I bought the non adjustable Trail kit for my 5th Gen Ram 1500 with a 2” lift. The welds look great, nice powder coat finish and quality bushing. Had some trouble fitting the grease nipples due to the powder coating but a thread tap would fix that. They fit easily and perform great. I felt the improvement straight away. No more wheel hop on hard acceleration which was my main reason for the purchase. I was missing some smaller bushings needed for the 5th Gen and Korby’s custom service was on point, with responsive emails and mailing out the missing parts straight away. Very happy with their products and customer service. Highly recommended company👌🏽
P
Paul Mar 24, 2023
★ ★ ★ ★ ★ Google
I've been having trouble with the track bar (on my 2nd gen Dodge) since I installed the 3rd gen Synergy adapter bracket and a 3rd gen stock bar.. oddly, they call it a '3rd gen bracket' and the stock 3rd gen bar doesn't quite fit, making contact with the bracket. I had attempted to clearance the bracket but it was still making contact and I could feel it over large bumps. I reached out to a lot of companies, but Core 4x4 offered to make a custom bar for the application with adjustability and dual Johnny joints. The first pass on it didn't work but they sent me out another passenger side end that made it fit incredibly well. This was all done solely over email/descriptions/pictures/measurements. Bar is super high quality and heavy duty, made in the US by a family owned company and carries a lifetime warranty. The customer service was responsive and superb, and the price was a lot less than I expected.
JJ
Jason Jukich Jul 26, 2025
★ ★ ★ ★ ★ Google
Fast shipping, excellent communication, and awesome products
D
David Nov 23, 2025
★ ★ ★ ★ ★ Google
First of I just want to say Great customer service korby Has helped me from the start and has not let me down! Reached out to him again today and he was able to warranty some parts out for me. As far as the quality of the parts.. excellent! The build quality is great. I can definitely tell a Difference from the cheap oem rear control arms to these and the pan hard bar. Color, From what I can tell it’s super durable been through a few mud holes on top of the daily road grime and after a quick wipe they still pop! Overall I recommend. Customer service is everything for me and it’s definitely there at Core 4x4.
PG
Paul Griffin Feb 21, 2026
★ ★ ★ ★ ★ Google
Great long arm kit with everything else I needed as well! They worked with me to ensure that I was getting an upgraded components kit just like I wanted. Fast shipping with some of the best packaging that I have ever seen. Nothing was scratched or missing and this kit is even more impressive than the videos or website can show. Powder coating looks great with no issues. I would highly recommend CORE 4x4 to anyone looking for a great quality kit.
PM
Paul Melancon Aug 25, 2025
★ ★ ★ ★ ★ Google
Ordered a control arm and track bar kit for my WJ from Core 4x4 on Monday 7/28 and received it today, Friday 8/1. Im not a state or two away, im in CT aka the other side of the country. Communication is phenominal, emails were responded too in an hour or less. Parts arrived well packed, not damaged, and are great quality for my needs. There arent many companies left that service customers as well as Core 4x4 and i wont hesitate to check them out again if i need something else. Well done!
MT
Marcus Torres Jan 15, 2026
★ ★ ★ ★ ★ Google
Best control arms I have installed on any of my builds. After running every major manufacturer, Core 4x4 is on par or better than all the high-end companies at a fraction of the cost. Lifetime warranty is the cherry on top.

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.
Hardware No Hardware, Complete Kit
Vehicle Jeep Grand Cherokee WK (05–10)
Brand CORE 4X4
Series Cruise Series
Note to Core4x4: -
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