Hello just got myself a 2005 mazda rx8 looking to put on a highflow cat and exhaust asap I think srmotorsport highflow would do just fine but I am stuck between 3 exhuast sytems b&b racing exhaust borla exhaust jic racing exhaust I love a more deeper tone to my exhaust anyone out there help me

 

The car is really gonna be loud with that combo. If you ever come to any of the meets you should listen to Matt's car with the highflow and MS exhaust. Anyways out of the three exhausts I would get the Jic, because I think it looks the best as opposed to the others you mentioned.