Flowmaster

74DartSwinger360 said
Run Walker Dynomax Super Turbos. They idle pretty loud and when you stomp the skinny pedal they get really loud. A plus is not much drone at all. My dad runs these on his 68 440 Charger 2.5 inches all the way out the back. Manifolds an H pipe right in front of the bucket seats and finished with polished stainless tips. My Dart will soon be running them as well.
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Those are some of the quietest mufflers I've ever heard, for "performance" mufflers anyway. Not so great for performance either. The only thing that beats the sound of 2 chamber Flowmasters is the Thrush welded. Same thing for half price. If you want the most power and a good sound, Magnaflow is the way to go.