Metal-tech 4x4 GX460 Rear Coil Conversion Stage 3 (Stock Height) w/Key Cones

Lexus GX460 Rear Coil Conversion – Stage 3 Complete Kit

Stock Height | Eliminate Airbags | 100% Bolt-On | Made in USA

THIS IS YOUR FIX

For any Lexus GX460 with leaking or failed rear airbags.

If your GX is sagging, uneven, or you've been quoted thousands to replace factory air bags — this is the permanent solution.

• No more airbags.
• No more leaks.
• No more expensive dealer replacements.

Just reliable coil springs — the way Toyota builds the Prado, 4Runner, and FJ Cruiser.

Why Stage 3 Is The Smart Choice

Stage 3 is our complete, stock-height solution.

• ✔ All Stage 2 conversion components
• ✔ Super Stock rear coil springs
• ✔ Patented Key Cones dual-rate secondary springs
• ✔ CNC-machined UHMW spring tail isolators
• ✔ Precision bolt-on spring locators
• ✔ All required hardware

Everything needed to remove your rear suspension airbags and convert to traditional rear coils, keeping you at factory ride height with an amazing ride.

No additional parts required. No fabrication. No guessing.

100% Bolt-On Installation

• No drilling
• No welding
• No permanent modifications
• No fabrication

Remove your rear suspension airbags using the included components. Install the locators. Install the springs. Pull the suspension fuse.

Everything needed to remove your rear suspension airbags is included in this kit.

Estimated install time: 2.5 hours

We provide:

• Detailed install guide
• Full step-by-step install video
• Direct support for your installer or shop

Any competent automotive shop can install this.

🎥 Full Install Video

This is an outstanding step-by-step guide to swapping out your airbags with our kit.

The Super Stock Spring (Included in Stage 3)

Most GX460s converting from airbags need slightly more spring rate than a standard Prado 150 rear coil.

So we engineered our own.

We reproduced the OEM Toyota Prado 150 rear spring in the USA and added:

• +5% spring rate
• Stock ride height

Result:

• Factory stance
• Improved stability
• No sag
• No harsh ride

Built in the USA. Designed specifically for GX airbag conversions.

Why a “Super Stock” Rear Spring — Why Not Just a Prado 150 Spring?

That’s a fair question.

The Lexus GX460 is consistently heavier than the same-year Toyota 4Runner — generally weighing about 300–600 lbs more due to:

• The larger V8 engine
• Increased sound deadening
• Additional luxury features
• Heavier interior components

Years ago, the first springs we used in our conversions were custom built to match the Toyota Prado 150 rear spring rate.

They worked. But the Prado-based spring was designed around a lighter vehicle platform. While it bolted in correctly, it was right at the edge of ideal performance for the heavier GX460.

We wanted better.

So we spent over two years testing custom-built rear springs in search of what we call the “Goldilocks zone”:

• Not too soft
• Not too stiff
• Not lifted
• Not saggy

Just right for a stock GX460.

What we discovered was that the GX460 needed slightly more support than a true Prado 150 coil — but without increasing ride height.

The result was our Super Stock Spring, introduced in 2019.

It features:

• OEM Toyota mounting geometry
• True stock ride height
• Approximately 5% increased spring rate
• Improved long-term consistency
• Better control under the weight of the GX platform
• Lasting performance year after year

Since 2019, this has been the spring included in all Stage 3 kits.

It keeps your GX at factory height — with an amazing ride — while properly supporting the heavier Lexus chassis with durability you can count on long term.

That’s why we don’t simply use a generic Prado spring.

We engineered one specifically for the GX460 — The Super Stock.

Patented Key Cones – Dual Rate Secondary Springs

Toyota calls them “secondary springs.” Most brands ignore them. We didn’t.

Key Cones were developed by Metal Tech 4x4 in collaboration with the #1 polyurethane suspension manufacturer in the United States over a three-year engineering process.

• Dual-durometer high-performance polyurethane
• Soft initial engagement for comfort
• Progressive lower body for control near full compression
• Increased suspension stability under load

100% Made in the USA.

Protected under US Patent No. 11,691,473.

Many GX owners who purchased other conversion kits later come back to purchase Key Cones separately. Stage 3 includes them from the start.

CNC Machined UHMW Spring Tail Isolators

This is where most conversions fail.

Polyurethane isolators can be too soft, allowing the spring pigtail to crack over time. Aluminum provides no vibration isolation and can introduce corrosion between dissimilar metals, accelerating wear on the spring.

We machine ours from UHMW — the same material used in orthopedic implants.

• Full pigtail support
• Vibration isolation
• No cracking
• No metal-to-metal contact
• No corrosion issues
• CNC machined in-house

This is one of the most advanced lower spring mounts in the industry.

Why Trust Metal Tech 4x4?

Metal Tech 4x4 released the first bolt-in GX coil conversion kit in 2008.

• Over 15 years of refinement
• 100% CNC machined in the USA
• 100% US-made materials
• Engineered, tested, and manufactured in-house

This is the Original GX Coil Conversion System — now evolved into Version 3.0.

Not a copy of our early kits. Not a reproduction of outdated designs.

This 3.0 system represents over 15 years of actively building, testing, and improving Lexus GX suspension systems in real-world conditions.

Every material upgrade, machining improvement, geometry refinement, and performance adjustment has led to this version.

This is the most refined GX coil conversion system we have ever produced.

What’s Included

• (2) Super Stock Rear Coil Springs
• (2) CNC Machined UHMW Spring Tail Isolators
• (2) CNC Bolt-On Spring Locators
• (2) Patented Key Cones
• Complete hardware kit
• Detailed install guide
• Full step-by-step install video
• US-Based direct support from the people who invented the original GX airbag conversion kit -US. 

When you call or email, you’re speaking with the team that engineered and refined this kit — not a reseller or call center.

Which GX460 Rear Coil Conversion Kit Is Right For You?

Not sure which to choose? If you want the simplest, most complete solution at factory ride height — Stage 3 is the answer.

Fits: 2010–2018 Lexus GX460

Free Shipping: Lower 48 States

Estimated Install Time: 2.5 Hours

This Is The Permanent Fix.

• No more sagging.
• No more warning lights.
• No more expensive dealer replacements.
• No more wondering if you bought the right parts.

Just a complete, engineered solution.