BMW Exhaust Valve Controller Module with App Control

BMW Exhaust Valve Controller Module with smartphone app control. Open or close your exhaust valves independently of drive mode via Bluetooth app. Plug-and-play OBD installation, no cutting wires. Compatible with all BMW models with factory exhaust valve flaps. $459 USD at M-TRI UPGRADE.

Sound familiar?

• Your BMW sounds flat and muffled at startup — the exhaust valve stays closed and you never get that cold-start bark the M cars are known for.
• You paid for an M-sport or M-performance exhaust and it only opens the valve at high RPM, leaving most of your driving sounding stock.
• Your friend's M3 has a Sport+ exhaust mode and yours doesn't — same engine, different software, completely different character.
• You want the valve open all the time on track days, but closed on early morning drives, and there's no way to switch without a full tune.
• The dealer quoted you hundreds just to change the exhaust map — for a feature that's physically already on the car.
• You've seen the exhaust flap sitting there doing nothing during normal driving and wondered why you can't just control it yourself.

BMW Exhaust Valve Controller Module with App Control (Single / Dual Valve)

An exhaust-valve controller module that takes over the factory exhaust flap(s) on M-sport and M-performance BMWs, giving you full manual or RPM-based control over the valve angle - and therefore the exhaust tone - from a WeChat mini-program on your phone.

Available Configurations

• Single-Valve edition - for models with one exhaust valve (typically mid-range and some M-performance cars)
• Dual-Valve edition - for M-sport / M-performance models with two exhaust flaps

Control Modes

1. Original Car Mode - factory-stock valve behavior, fully reversible
2. RPM Mode - set the valve angle independently for each RPM band:
   • Idle valve angle (30° / 100°)
   • 1000-2000 RPM valve angle (50° / 100°)
   • 2000-3000 RPM valve angle (50° / 100°)
   • Above 3000 RPM valve angle (50° / 100°)
3. Driving Mode - sync the valve to the factory driving mode:
   • Eco mode - valve closed
   • Comfort mode - 30° / 60° / 100°
   • Comfort Plus mode - 30° / 60° / 100°
   • Sport mode - 30° / 60° / 100°
   • Sport Plus mode - 30° / 60° / 100°

Special Function - Activate Roar Mode

Opens the valve for a timed burst (Off / 10 sec / 20 sec / 30 sec) for a dramatic cold-start roar or rev-up sound-show on demand.

Vehicle Fitment

BMW BCP-compatible chassis with factory exhaust flap actuators. Specify your model and year when ordering.

Installation

Plug-and-play - inserts between the factory valve actuator and the original harness. No cutting, no ECU coding. All control is from the mini-program on your phone.

Frequently Asked Questions