The Remus Sport exhaust isn't going to be much louder than stock once you get the system warmed up. Once you turn the car on, it actually is pretty loud, but once the motor warms up and everything gets settled the sound actually dims and becomes a more distinct and beautiful sound. You can check out the videos right here that we have from our E92 M3. I notice you're in LA so if you wanted to come on by and listen to it in person, we can arrange that for you!
I hope that helps your decision. If you have any further questions feel free to send me a PM
