I've just purchased my 2017 LBB M2, and I was looking in to making the car louder, I did consider a down-pipe but in my country unfortunately it's illegal and only parts past the down-pipe/headers are legal and it may be problematic.
I looked a lot and haven't found someone whose done it before and as I plan on doing that mod i wanted to check maybe someone that has done it before can give a review or your opinion about the idea
It's also important to mention I am looking to making the car more than livable in comfort mode that there won't be any drone or won't wake up the whole neighborhood lol