VETTEPRO
check out this post
https://f15.bimmerpost.com/forums/sh...php?p=25102197
Guy did electric cut-outs. He also tried adding an X pipe. He said x pipe was quieter and didn't sound as good.
I have done a few x pipes on NA cars and found that the sound and tone was improved. Maybe not with turbos??
I am either going to do a muffler mod like suggested or e cutouts. E cut-outs will be louder and can control with a separate remote to open/close anytime I want.