I installed yesterday the exhaust valve controller from PEEM Solutions in Germany:
https://www.peem-solutions.de/exhaust_valve_controller
The advantage is that you can open and close the valves by pressing the RES button for 1.5 seconds on the steering wheel.
The disadvantage is that it is not that easy to install. You have to pinout some cables of the BDC module and so on. So it's really not easy to do the installation.
Here a video of the functionality:
And some impressions of the installation
