[lawfive1]

 

[lawfive1]

Here are a few pictures of my exhaust system.
Thank you!!

 

[lawfive1]

Hello;
To further our discussion, I have been all over the underneath of my 640iGC. There are no visible signs of exhaust flaps or any type of exhaust restriction. There is the Cat (at the engine), and a single silencer/muffler in the center of the chassis with two exhaust pipes going through, and then finally the two end mufflers. Pulling the F135 fuse changed nothing (in terms of the sound). However, when first started the exhaust sound is remarkable. When my car warms up, I cannot seem to duplicate the sound (manually).