SST Valve Controller BMW M3 G80 M4 G82

In Stock: Ships in 1–2 business days
Available to Order: Ships in 3–4 Weeks

Looking to finally unlock the true sound of your G8X—without restriction?

From the factory, the G8X exhaust valves are constantly opening and closing based on throttle, RPM, and drive mode. Even in the most aggressive settings, the system rarely allows the valves to stay fully open.

The SST Valve Controller removes that limitation — giving you full, consistent control over your exhaust sound.

Run your valves:

• Fully open

• Fully closed

• Or somewhere in between

Anytime you want.

Aggressive.
Controlled.
OEM+ sound unlocked.

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Why this Controller

On the G8X platform, exhaust valve behavior is more restricted than most expect:

• Comfort → ~0–10% open (mostly closed)
• Normal driving → ~0–30% open
• Sport / Sport Plus → ~30–50% open (still fluctuating)
• Full throttle → ~70–80% open (never truly 100%)

Even at wide open throttle, the valves are not consistently fully open — and they immediately close again once load drops.

The SST Valve Controller eliminates this inconsistency.

With dedicated control modes, you get full authority over your exhaust:

• 100% (Open) → Maximum sound at all times
• 0% (Closed)→ Quiet when needed
• Factory Mode → OEM behavior
• 50% Mode → Balanced daily tone

What sets SST apart is its OEM+ engineering:

• Built-in valve diagnostics for system monitoring
• Memory function (retains last setting at startup or setting of your choosing)
• Seamless integration with factory electronics

No coding.
No warning lights.
No compromise.

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Installation Overview

• Fully plug-and-play installation
• Connects directly to factory exhaust valve harness
• Mounts in trunk or behind rear bumper (IP66 rated)
• No coding or permanent modification required

Full installation and review video on my G8X build 

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Fitment

BMW G8X Platform:

• G80 M3
• G81 M3 Touring
• G82 M4
• G83 M4 Convertible

Compatible with both OEM and aftermarket exhaust systems.

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Construction

• Made in Germany
• IP66 Dustproof & Waterproof Housing
• Compact Control Unit (65 × 50 × 35 mm)
• Dual Exhaust Flap Control
• OEM-Integrated Electronics

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What's Included

• SST Valve Controller Module
• Plug-and-Play Wiring Harness
• Remote Control
• Installation & Operating Instructions

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Automaz Approved

BMW engineered the G8X exhaust for refinement—but in doing so, it limits the car’s true sound potential.

This controller gives that control back to you.

Whether you want full aggression, complete silence, or something perfectly in between, the SST Valve Controller delivers consistent, reliable control with true OEM+ integration.