Full Suspension Lifts for the GX 550

What full-replacement suspension systems are available for the GX550?

So far I have seen:
King
Icon
Fox
Dobinson's
Radflo
ARB/Old Man Emu
Ride Shocks (I think they have/or will have an option for the GX550)

It's kind of difficult to understand exactly what's needed for a full suspension upgrade. Some offer just the front & rear shocks, some include upper control arms, some include UCAs and rear upper & lower links, some include all of the above plus a rear track bar and a front diff drop. The Icon Stage 10 includes it all - I just noticed that the Icon Stage 10 Billet package is on sale from $11,285 down to $9,458. That's a good savings. Too bad about "APPLICATION NOTE #175: Will not fit GX550 Overtrail"!

As much as I'd like to install a full suspension system myself, I will probably have to go to a place like Westcott and pay them to consult on exactly what I need for my purposes. The easiest way to get their full attention and advice is to pay $$$$ for the installation.
You wouldn't happen to have a link for the fox suspension you found for the GX? I couldn't find anything from them for my GX. TIA
 
I haven’t found an actual 550-specific-marketed system yet. I’m looking into it, though, as I’m pretty much ready to purchase. I’m leaning towards King.
 
That’s exactly where I am but I’m going to take a look at the Radflo/Dobson combo. I’m also waiting to hear back from Bilstein R&D. I want to do something by Fall. Have you checked out the lead time for King. I hear 10 months?
 
Just for kicks I went to Chat GBT and asked for an evaluation of the best full suspension lifts for the GX 550. Below is the answer I got. Sorry I couldn’t format it any better



Got it — let’s break this down carefully.





The Lexus GX 550 (2024+) is the new generation of the GX, now built on the TNGA-F platform (same as the Land Cruiser 250 and Tacoma). It comes with factory coil springs, a solid rear axle, and independent front suspension (IFS). There’s no OEM full air suspension like older LX models — so when people ask about a “full suspension system” upgrade, they usually mean a complete aftermarket suspension lift kit that includes:





✅ Upgraded coilovers for the front


✅ New rear springs and shocks


✅ Adjustable upper control arms (UCAs) for alignment


✅ Possibly a long-travel setup if you’re going hardcore














🏆


Best options right now (2024–2025)








For the new GX 550, top-tier suspension upgrades come from brands known for off-road Toyota/Lexus applications:














1️⃣ ICON Vehicle Dynamics








  • Pros: Bolt-on, well-tested on the TNGA-F platform. They have complete Stage 1–8 kits with remote reservoirs, adjustable compression damping, progressive-rate rear coils, and upgraded UCAs.
  • Cons: On the pricier side.
  • Why it’s good: ICON’s reputation for Toyota 4x4s is outstanding. Great balance of on-road comfort and off-road performance.
















2️⃣ ARB Old Man Emu (OME) BP-51








  • Pros: OME’s BP-51 bypass shocks are internal bypass, fully adjustable compression/rebound, and tuned for heavier overland builds.
  • Cons: Ride is firmer than ICON on-road; you’ll feel the tuning if you’re not loaded up.
  • Why it’s good: Legendary durability, globally proven. Tons of parts availability.
















3️⃣ King Shocks








  • Pros: If you want top-tier, fully rebuildable performance, King offers remote reservoir coilovers and shocks with custom valving.
  • Cons: Pricey; best if you’ll actually use the performance off-road. More maintenance required than plug-and-play kits.
  • Why it’s good: King is the gold standard for serious off-roading and desert running.
















4️⃣ Dobinsons IMS or MRR








  • Pros: Excellent mid-tier option, great for overlanding. Dobinsons offers a wide range of coil rates, perfect if you’re adding bumpers, winch, or RTT.
  • Cons: Less plush than ICON or King, but bulletproof.
  • Why it’s good: Great value for money, good tuning for loaded rigs.
















🔑


Key factors when choosing








✅ Weight: Will you add steel bumpers, winch, sliders, RTT? Heavier loads need heavier coil rates.


✅ Ride comfort vs. performance: Some systems are plush on-road, others prioritize high-speed off-road control.


✅ Future upgrades: Some systems (like ICON) are modular — you can start with Stage 1 and add reservoirs later.


✅ Installation: Full suspension lifts may affect KDSS (if equipped) or advanced safety systems.














⚙️


Good example combo








For an all-round build:





  • Front: 2.5” adjustable coilovers (remote reservoir)
  • Rear: Medium-duty coil springs + matching shocks
  • UCAs: Adjustable or high-angle to maintain alignment
















✅


My recommendation








For most GX 550 owners who want better off-road performance, moderate lift, and comfort:


ICON Stage 2 or 3 or OME BP-51 kit is the sweet spot. If you’re going hardcore: King 2.5 kit with upgraded UCAs.











If you want, I can help you:





  • Figure out the right spring rate for your planned gear weight
  • Recommend specific part numbers
  • Suggest reputable installers







Just tell me how you plan to use your GX 550! 🚙✨
 
I really like the Icon stage 10 system as described by the reviews - good on& off road handling, compliant on road but can take the heavy duty abuse off road, longer travel than most, plus the stage 10 electronic dampening control. I want them to officially approve it for Overtrail installation, however.

Or maybe I’ll order up a full set of Kings with the billet UCAs and see if I can get custom bright green anodizing to match my company logos colors. This is a work truck, after all.

In the meantime, I’m testing out the suspension on my 4X4 Ford Mt. Everest here in La Fortuna, Costa Rica.
IMG_6428.jpeg
 
Same here. Probably won’t install until this fall though.
There were not any fitting instructions in my coilover boxes, the rears had instructions. I reached out to ARB and they gave me this generic sheet.

They also said the 250/GX550 coilovers are set up for maximum height from the factory. So the clip is in the top position. I only wanted 1-2" of extra height from stock and they recommended moving the clip position down 3-4 grooves.
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GX550 Poll

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