Had them on a 72 Dart, 360 iron manifolds, no drone, sounded like the video clip at idle, quiet on the highway. At the same time I had a 64 300 with Flowmasters that were loud (413, iron manifolds) loud enough to wake the neighbors when I left for work and loud enough to trip car alarms.
Dynomax - wife approved Flowmasters - driver approved (everyone else wanted to tar and feather me
Your choice
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.