I'm looking for a CAT-BACK system that has more of a deep growl than a raspy sound. Can anyone give me any recommendations? Thanks, Creed

 

Search and you will find.

 

B.O. ? Is this an aftermarket brand name? Can't find it on an internet search. Thanks, Creed

 

BO = Black Obsidian, the black color for G37.

B.O/Graphite = black exterior/graphite interior.

By search, he meant to say use the search function here on the forum, located on the top menu section.

There are many many choices. Different people have different preferences. You can probably narrow your selection down after some searching. Then we can answer any questions you might have about specific exhausts.

My preference, MXP exhaust.
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B. O. could also be body odor!

 

There's a whole subforum on myG37 discussing exhausts, please look around and utilize the search feature