I been searching around for the best and loudest exhuast but dont know what to choose..what is the loudest exhuast out there for a 08 g37 coupe? Something that would wake up the neighborhood and maybe be louder than a mustang exhuast if there is one?

 

Just run open headers.

 

Motordyne catback with Motordyne art pipes will be loud and great quality, Meisterchaft full catback but is super expensive, Ark catback is loud as well!

 

Or you can straight pipe it but it will probably be raspy