Service was great. Delivered quickly.
I am probably removing the device as it doesn’t make much of a difference in comfort mode and no difference in sport mode.

Works great on my car. You can tell a difference, when this device has been added, in all modes on my C63 amg S.

The controllers work as advertised, enabling the exhaust valves to be opened fully, or reverted to stock opening strategy; both modes at the touch of a button on the supplied remote. I suggest ordering a second remote to be kept at home as a spare. Easily installed on this car without removing any panels.

So easy to install. Simply unplug the original plug, plug in the 11MODE adapter and then plug the cars original connector into that. DONE!

Works great.

Funktioniert einwandfrei :-)

Completely tool-less, 10 minutes installation, fully plug and play, no check engine light, no stored soft codes. Now with the new functionality, it's even better!

Brilliant product!! Installation time is 2-3 minutes per side and it will definitely have a deeper sound than the factory system. What I like the most is that it provides the same sound in all modes (not just sport or sport+).

I am satisfied and would recommend it to anyone looking for a valve controller.

Perfekt

Great product, plug and play made easy! Although the install was a PITA for the passenger side exhaust.

Instalation was quite easy. I din't have to even lift the car. Ofc it would be easier but it isnt nesecery.
The sound difference is noticable, espetialy in lower RPM ranges.
The only downside is that it dosn't have memory option and you have to reenable it each time.
Over all great product!

Opening the valves gives great extra noise at high rpm in the lower gears without needing to use M1 or M2 modes. I drive in manual mode more often than not now so I can get the max noise.

Install took a bit longer than stated, just because the connectors took quite a bit of force to click into place and I didn't want to break anything. All in all, very simple install.

It is really nice, even better than I expected, howeasy it is to install and how better the car sounds

nice solid remote.

Plug and play. No wires. Hassle free. Would recommend if you want your valves open in comfort/normal mode. In sport mode it is even louder paired with after market exhaust set up. When you turn off car it reverts back to OEM setting.

Comport mode noticeably difference from quite and refined to aggressive. The responsiveness is impressive to my Vw golf R black edition. I recommend this product.