Muffler Options
I just switched from 40's series Flowmasters that rusted out (14 years of use), to Dynomax Race Bullets. The bullets are about the same idling, maybe a little louder at part throttle, but definitely louder at WOT....I don't mind my car being loud though, I can't really sneak around town with a plum crazy purple Barracuda anyhow :D....might as well let folks know there is something MEAN going down the road, lol.
FWIW, I like the sound of the bullets better than the Flowmasters...not as tinny sounding, and has a much more aggressive tone.