Metal-tech 4x4 GX470 Rear Coil Conversion Stage 3 (Stock Height) w/Key Cones

Lexus GX470 Rear Coil Conversion – Stage 3 Complete Kit

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

THIS IS YOUR FIX

For any Lexus GX470 with leaking or failed rear suspension airbags.

If your GX470 is sagging, leaning, 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 rear coil springs — the way Toyota builds the Prado 120 and 4th Gen 4Runner.

Why Stage 3 Is The Smart Choice

Stage 3 is our complete, stock-height solution for GX470 owners who want to eliminate airbags permanently.

• ✔ 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.

The Super Stock Spring (Included in Stage 3)

The Lexus GX470 is consistently heavier than the same-generation 4th Gen Toyota 4Runner — generally weighing 300–500 lbs more due to:

• Increased sound deadening
• Additional luxury features
• Heavier interior components

Early on, the first springs we used in our GX conversions were built to match the Toyota Prado 120 rear spring rate.

They worked. But the Prado-based spring was engineered around a lighter platform. While it bolted in correctly, it was right at the edge of ideal performance for the heavier GX470.

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-height GX470.

The result was our Super Stock Spring.

• 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

It keeps your GX470 at factory height — with an excellent ride — while properly supporting the heavier Lexus chassis.

We engineered one specifically for the GX470 — The Super Stock.

Patented Key Cones – Dual Rate Secondary Springs

Toyota calls them “secondary springs.” Many conversion kits ignore them. We don’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.

Stage 3 includes them from the start — because a complete system matters.

CNC Machined UHMW Spring Tail Isolators

This is where most conversions fall short.

Polyurethane isolators can be too soft and allow 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

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

Which GX470 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: 2003–2009 Lexus GX470

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.