Sounds much louder when open Very pleased and so simple to fit Inside the car i can now hear the exhaust sound

Excellent product & fast shipping! Really happy with the product & installation was super simple! Would recommend you get them for yourself.

Verry impressed , the sound difference is noticeable especially while driving. I hear a more growling sound from the exhaust an unlike the exhaust without 11MODE, it keeps a deeper tone all the time. Great bang for the buck.

I bought this for my M2. It took less than 5 minutes to install and I didn’t have to lift the car to do it. It sounds much better with the valves fully opened. This was way cheaper than spending thousands on a new exhaust system. I would recommend this to anyone that is looking for a better sound and don’t want to pay thousands on an aftermarket exhaust system.

it works exactly how I hoped.

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.