help with exhaust

[vsowner94]

g'day all,

I would like to make my exhaust have a bit of a deeper/louder note.
already have a 2.5" system on and extractors, as well as that very rear muffler thing
removed, all ending with a twin tip. The car came like this but i would like a deeper note.

Car is only a auto v6 but is there anything i can do??

I dont want it to sound like putting a fart cannon on an excel.

[seq4x4]

Installed 2 more cylinders? Whats the set up, from extractors to tip? Brands and sizes. Also how its done.

[scvs6]

At the moment, I just have pacemaker extractors, standard cat, 2.5" redback exhaust and one redback sports muffler and the note is more then loud enough. Any louder then its going to bring even more attention the the police.