Travis,
The spare can stay if oem. We had a member that put that system on. Maybe he will chime in.
Those are glass packs. One thing I do know is. Any car that has the glass packs at the end of the pipes. Do have a different sound than if they ae before the axle.
Not familiar with them on a V6. On a v8 the sound is quiet, compared to before the axle.
We all know what 4 banger rice sounds like though. That is all the coffee can mufflers are. The difference is the diameter of the coffee cans. Tends to make noise because of the resonance of a 4 banger.
I say it is your trac. Do as you like.
I have the magnaflow cat-back. With the RT y-pipe and oem main convertors. I had the tip cut and re-routed to the rear, with an oval tip. Reving in park the sound is not as good, but not obnoxous. In drive it has a deep throuty sound. Most of all no drone in the cab. Of course I have performance tunes from torrie. Im pleased with the sound and results.
As I said before, it is all about the right system for a V6.
I would not have used a flo-master on any car. They are loud and sound like marbles.
Its your money. Ignore the nay sayers. Do as you want.