You can get deeper if you like with: REMUS Innovation, Austria, as a huge O.E.M. supplier to several top German car makers, especially BMW, is keenly aware that the system in front of the RS (Rear Silencer) is
generally quite good, as it is likely they built it. FS’s (Front Silencers) usually don’t have much in the way of back pressure, as all they’re intended to do is break up those high speed travelling sound waves.
So they tend to send quite a few axle back ‘splice on’ or ‘bolt on’ systems around the world. They also know that deleting an FS is childs play at most performance or even muffler shops. So if you need more sound go ahead and delete your FS w/ straight tubing or replace your front section with the REMUS RT (Race Tube).