its on my car now and i love the sound. Not too loud when driving normal and you really hear it when you step on it.
compared to the oem (if someone wants to buy the oem let me know)
on the car with my new csl diffuser (don't mind the corner of the diffuser, my corner tabs are broken)
It has the heart/soul of a normal e46 m3 muffler but more aggressive and neck breaking. Hard to describe but its sounds the same at lower RPM but a bit more throaty and aggressive while going through high RPM
A lucky guy picked it up and i wish i never sold it but needed money so i threw my old one back on.
Also the comment above is pretty much how it sounds.
Wasn't too loud, just perfect.
At low RPMs its not too loud, a little deeper than stock, which was my fav part. But once you step on it its a whole different story.
Only negative parts was it was kind of raspy with everything else stock, if you were looking to do headers and this exhaust then its a very nice sounds, guys on m3forum know about this as there are only a couple people who own these. And for some reason its finally starting to come out of the closet lol