Truth to the statement. Aim to balance the sound of your car with its power. In other words, are you shooting for a loud sounding car to give the (false) impression that you are driving a beast? IMO the sound should be consistent with what your car can really put out... otherwise you'll be no better than a beat up '86 Chevy Celebrity where the muffler has fallen off.
I would agree with you to a point but, having a nice sounding exhaust shouldn't exactly represent how fast it is, that's more what the driver does to the car itself (AKA reving/showing off to the extreme). Nothing wrong with making a car sound nice (keyword being nice), and having a muffler fall off of any car just sounds like crap, nobody would think it was fast. So with that, just because your V6 runs 15's or even 16's doesn't mean you couldn't put some flows on it to make it sound nicer.
loud - LT's, 2.5" h-pipe (not from mac, their cats are pieces of ****), pypes mini cats (or offroad, if no emissions), and a chambered muffler (force mufflers are a knock off flowmaster, are cheaper, and sound better)
good - LT's, 2.5" x-pipe, pypes mini cats, and a flow through muffler (magnaflow, dynomax)
h-pipes go with chambered mufflers, x-pipes go with straight through mufflers, and straight pipes go with anything. turndowns sound like ass inside the car, plus you cant carry on a conversation without shouting.
Yeah, but you wont sound near as raspy.....put, I had a GT takeoff exhaust on my V6 and the GT is still a tad louder due to the increase airflow and displacement.
well of course a gt is gonna be louder than a v6. that is what we call common sense. any gt exhaust upgrades are gonna be louder than v6 exhaust upgrades. its the nature of the beast