I know someone has posted about this before but after 20 minutes of looking through the forum I can not find it anywhere.
I got my exhaust fitted and on the first morning my neighbours didn’t appreciate how loud it was haha I know someone posted on here saying that there was a kit you could buy to control the valve with an app and attachment on the valve. This way I can keep the valve shut on cold starts.
just a little disclaimer. I like my neighbours and they didn’t actually complain. However they did say that the car sounded a lot louder then normal