Back box delete

[DanJeans]

I have a 2 litre 2007 Z4
Simple question is it worth it for the noise to do a back box delete into twin pipes.
Currently it has a dual exhaust which then goes into 1 oval tip.

 

[Lee]

I've done this mod on my 6 cyl engine Z4 wonder what it would sound like with your 4 pot. Give it a try but keep the back box incase you want to go back.