SKU: 41821867427

Rear Adjustable Control Arms (03-24 4Runner, FJ, GX)

Sale price$418.05 Regular price$464.50
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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

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Description

Rear Adjustable Control Arms (03-24 4Runner, FJ, GX)IN STOCK READY TO SHIP. Performance + durability of a race part. Manners + longevity of a stock part. The best of both worlds. Over the past 10+ years of building and breaking 4Runners, we have experienced a lot of different rear arm kits. There were lots of options on the market, but there just wasn't anything that checked off all the boxes. So we decided to build our own set of arms, using overkill steel tube, top quality machining, and the

IN STOCK READY TO SHIP.

Performance + durability of a race part.
Manners + longevity of a stock part.
The best of both worlds.

Over the past 10+ years of building and breaking 4Runners, we have experienced a lot of different rear arm kits. There were lots of options on the market, but there just wasn't anything that checked off all the boxes. So we decided to build our own set of arms, using overkill steel tube, top quality machining, and the industry's gold-standard Johnny Joints®.

Description:

Thick-walled DOM steel:

  • No more breaking and bending rear arms! 1.625in tube lowers, 1in tube uppers for the best compromise between strength and clearance throughout travel.
  • Wrench flats for easy adjustment and torquing of the lock nuts.
  • Powdercoated textured black with etched-in Opt logo.

Adjustable, offset design:

  • Correct your pinion angle to prevent premature u-joint wear and vibrations (if you have a lift then this applies to you).
  • Move rear axle position for better tire clearance.
  • Upper- Double adjustable design, for easy fine tuning after install. No need to uninstall anything to adjust the length. Simply loosen the jam nuts, dial in your lengths, and then tighten the jam nuts back down. Double-adjustable arms also have twice the adjustability length (3in) versus single-adjustable arms.
  • Lower- Offset joint on one end for better clearance of the oversized joint throughout travel. Lifted trucks tend to have clearance issues at full droop due to the very tight design of the factory axle mounts.

Johnny Joints® throughout: (valued at $66 each, or $528 for a full set!)

  • Sealed, greasable flex joints with ultra-low maintenance and none of the clanking or squeaking of other flex joints and heims. (our V1 prototypes were used for 5+ years and were never greased or serviced, for testing purposes.) They're serviceable and easily rebuildable, so it's money saved in the long run.
  • More articulation than stock, polyurethane, heims, and other flex joints. Johnny Joints have an impressive 34-42 degrees of articulation depending on the joint (other brands claim up to 33).
  • Custom machined for our Toyota trucks (perfect fitment with stock mounts and hardware). To our knowledge, these are the first and only set of rear uppers and lowers that utilize nothing but Johnny Joints! If you aren't familiar with their reputation, click here (short version: they're the best).

Pricing:

  • Upper Control Arms: $399
  • Lower Control Arms: $559
  • Full Kit, Uppers & Lowers: $929 ($29 bundle discount)

Timeline: In stock ready to ship!

Install Help: Watch Timmy the Toolman’s Install Video HERE (this video was for the 3rd Gen 4Runner kit, but the majority of it all still applies).

FAQs:

Without a poly/rubber bushing at one end, shouldn't I worry about damage to my truck's lower link mounts?

No! We designed the lower arms to include one narrow joint (for articulation) and one wide joint (for cushioning). The 'wide' model JJs have as much built-in cushion as a conventional poly bushing, due to the 2-piece construction of their proprietary urethane bushings. Regardless of your setup, we recommend installing a Lower Link Reinforcement kit on any trail rig, as the potential for mount damage increases the more you upgrade the truck and push the limits.

What should I use to grease the joints?

Any standard Moly Grease will do just fine, but Rock Jock 4x4 has a proprietary Moly Grease that is available in our Rebuild Kit menu.

Is hardware included?

No, we had these Johnny Joints custom built so they are specifically sized for our factory bolts! This helps keep your cost lower and makes installation easier.

 Why no adjustable panhard bar?

First and foremost, we recommend a Panhard Correction Kit before upgrading your panhard bar. Adjustable bars are proven to be less effective than a PCK, and more expensive at that. The PCK will solve both the axle recentering issue AND the geometry issue, unlike an adjustable bar by itself. Per eimkeith: "The Panhard Correction Kit returns the panhard bar to horizontal (per original design), eliminates the need for an aftermarket adjustable panhard bar to recenter the axle, and in most cases (up to 4 inches of lift) raises the roll center for improved handling..."

If you are in need of an adjustable panhard bar, check out the Double Adjustable Panhard Bar from KDK Fab.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 41821867427

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Somebodyzmom
Omaha, US
★★★★★ 5
My cat used it right away!
Size: 20.0"L x 20.0"W x 6.0''TH, Style: Round, Pattern Name: Bed
My large long-hair orange cat is a bed hoarder. He has at least 5 or 6 beds around the house, and uses every one of them (at different times, of course). But lately he's started sleeping on my pillow during the day, but going to bed at night on a pillow covered in his long orange hair wasn't cutting it for me. So I purchased one more bed for him - because heaven help me if I should move one of his other beds. What we won't do for our babies! Anyway, I put this new bed near my pillow and he's been using the bed instead of my pillow. It's soft and the bolsters are thick and it's just the right size for him to curl up in! He loves it! Win-win!
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Reviewed in the United States on March 14, 2026
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JB
Lake Worth, US
★★★★★ 3
Lopsided, but works
Size: 20.0"L x 20.0"W x 6.0''TH, Style: Round, Pattern Name: Bed
It's soft and good cat size. The bottom stuffing is uneven, so it leans a lot, no matter how I rotate it for the cat to try to even it out. But the old cat loves it, especially since it's positioned in a perfect spot; a "corner" by a hallway, so it feels safe, while letting the cat see everything from that out of the way vantage point. I've been trying to get him to use beds again (had to throw some out b/c he gets seizures which can result in loss of bladder control). It only took a few days for him to "discover" the new bed, and start adding it to his nap rotations. and he looks so cute in it.
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Reviewed in the United States on January 3, 2023
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Tierra Clark
Natrona Heights, US
★★★★★ 5
Great for all dogs
Size: 20.0"L x 20.0"W x 6.0''TH, Style: Round, Pattern Name: Bed
Durable and easy to vacuum and wash. Keeps its form well my smaller dog AND LARGE DOG find it comfortable
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Reviewed in the United States on March 31, 2026
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Maria Z.
Boise, US
★★★★★ 5
Great value, comfy, cozy, perfect!
Size: 36" x 36", Color: Grey, Size: 36" x 36", Color: Grey
My dog loves this bed. So do my husband and I. Firm, fuzzy, comfy, security and great value for the price. I recommend it and so glad I purchased it!!
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Reviewed in the United States on April 23, 2026
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Michael L.
Phoenix, US
★★★★★ 5
Super dog bed
Size: 23" x 23", Color: Beige
This review is from my dog Beau, “I love my new bed. It’s cushy and fits my 15 pounds of fluff and fur beautifully. I can stretch out and sleep on my back if I want. I really appreciate that it didn’t have any funky chemical smell when it arrived. My mom ordered the sand color to match my fur. She says it looks just like the picture. It’s really soft and comfortable, I won’t leave it long enough for her to wash it. She had to order a second one for the kitchen so she could finally wash the original. By the way, it washed perfectly and didn’t shrink an inch. “
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Reviewed in the United States on August 31, 2025

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