Simple, if somewhat over priced, this is easy to install, once you know how. (Pity I needed the help of social media, as the linked instructions were basic and not customised to my car.
For a Mk8.5 Golf R, drop the exhaust with the 2x 13mm bolt then you may have to reshape the heat protection a little to get the modules in place. No jack stands necessary. But I would recommend checking social media - the factory connectors are not intuitively shaped.

Simple install, does what they say it does. Full control of the exhaust valves. These were cheaper than other remote kits that researched also. Excellent product and good quality.

Item works as intended, hopefully stands the test of time, at the moment probably the best bang for buck valve controller on the internet

It gave an entirely new life to my car. I dont need to keep it above 3k RPM all the time to have the valves open. Installed it on a lift due to how low the car is in about 3 minutes the two controllers.

Very happy with this product, super easy install and came in great packaging. It was very interesting seeing what audi left on the table with the stock exhaust.

Bonus you can pair the controller to your Audi HomeLink to avoid reaching for the fob.

Super sweet OEM+ modification!

Memory function works great, 2016 GT350 exhaust valves with one click it’s great.

Very easy to set the controller to my car.
After set I feel very good sound from my exhaust.

Really great simple mod. Easy to fit if you have some DIY car maintenance skill (if not, I would suggest using a local motor mechanic to fit it). I needed to put the rear wheels up onto ramps to be able to access underneath the car to fit the exhaust controllers and a bright inspection lamp is needed too. I love the way with this that you can select exhaust valves always open and noisy but then “hand over” back to the car’s standard valve control system when wanting to be more conservative, just at the press of a remote control button.

Good easy to install bit of kit, took about 2 minutes to install and works as it should. Not a major difference as I always put car in RS mode after starting but now there’s a little pop/ bang on start up.

Couldn’t be more straightforward to install. Cold starts sound great as well as cruising around town. For highway driving it’s great to have the ability to return to factory with the push of a button. Now my X7 M60 sounds like the TT V8 that it is!

Nice upgrade to the exhaust. Takes about 10 minutes to install. I was able to sync the remote to my car mirror buttons. Just be aware that you two buttons to program the open and closed position. It sounds awesome! I highly recommend.

Alles top , funktioniert einwandfrei. Einfacher Einbau . Problemlose Lieferung

Left side took no time at all, right side you’ll need to loosen the exhaust hanger to get your hands in there, no need to jack up the car.

Excellent product

Great bit of kit what does what it says on the tin !