MAD Exhaust Valve Controller Essential

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

Lock your valves exactly where you want them.
No fluctuation. No inconsistency.

Aggressive.
Controlled.
OEM+ sound unlocked.

⸻

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 don’t stay fully open — and immediately close once load drops.

The MAD Valve Controller Essential eliminates this inconsistency by giving you fixed, usable valve positions:

• 100% Open → Maximum sound at all times
• 50% Open → Balanced tone with reduced drone
• 0% Closed → Quiet, controlled driving
• OEM Mode → Full factory behavior when needed

No overcomplication. Just the modes you’ll actually use.

⸻

Installation Overview

• 100% plug-and-play installation
• Connects inline with factory exhaust valve harness
• No cutting, splicing, or tapping power
• No coding or permanent modification required
• Installs in minutes

Mount in trunk.

⸻

Fitment

BMW G-Chassis Vehicles (Electronic Valve Equipped):

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

Compatible with OEM and most aftermarket exhaust systems with electronic valves.

⸻

Construction

• IP68 Waterproof Module
• Military-Spec Wiring Harness (heat-resistant sheath)
• OEM-Style Connectors
• Built for long-term daily use

⸻

What's Included

• MAD Valve Controller Essential Module
• Plug-and-Play Wiring Harness
• Two Premium Remotes
• Dummy Plug (for single-valve configurations)

⸻

Automaz Approved

Most drivers don’t need 10 different valve modes — they just want the right ones, instantly.

The MAD Essential focuses on exactly that: the positions you actually use, with zero guesswork.

Simple. Reliable. Consistent.

Designed for real-world driving, with true OEM+ integration.

Below is an install video I created for a different valve controller — the MAD Essentials installs the same way.