ok, what exactly are you looking for in sound? throaty or raspy?
unfortunatly, v6's dont make the same sounds as v8's therefore, my catless h pipe on your car would sound totally different then on mine.
if you are required by state to have cats, expect to see mild losses in HP (5-10) under a catless version. as well as a quieter, more restricted sound.
if you live in a "catless state" as i like to call them, (no emissions inspections) expect to see a decent horsepower increase (10-15),
some websites boast !!22HP!! on a stock mustang, but we all know thats just a sales gig. MAYBE 22 with a proper tune and headers.
i have heard some v6's that sound pretty decent though, flowmaster is your best option if you want to make those sounds.
i hope that answers some questions
