I had the BTG cat-back exhuast system (resonator + muffler) on my '02 5-speed Touring Edition and it was loud. There is a resonant peak at 3K RPM. Going with the axle-back version with a N/A is going to be very loud. Be prepared to add a glass-pack resonantor (or the BTG resonator) after the cat if it's too loud or if there's too much drone for you.
GG
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