[razzy530]

just ordered this one too. i hope i dont have to return it since im reading this is the "quiet one" Is it really different from the updated version?

[ctbear]

It seems like a lot of you guys are not aware of this thread:

https://f30.bimmerpost.com/forums/sh...d.php?t=978407

[thatBimmerBloke]

Originally Posted by ctbear

It seems like a lot of you guys are not aware of this thread:

https://f30.bimmerpost.com/forums/sh...d.php?t=978407

Part # 18302354339 apparently isn't very loud and was discontinued. After I installed 18302354340 the difference was clearly evident, different/louder throatier tone and I can easily hear the burbles inside the cabin with the windows rolled down which I never heard before on my stock exhaust. And this was right after installing it, even before any break-in period. I think currently I've about 300 miles on it since install and I've read that it takes about a 1000 miles to break it in nicely.