My pickup (350/350) had some probably 30-40 year old 24" glasspacks on it my great uncle had installed, that were pretty burned up sounding.
Just had some 18" Cherry Bombs welded in two weeks ago. True dual, OE manifolds, straight out the back. The outlets are, you know, 9 or 10 feet away from my head (LWB), and behind me, so they don't drown out the cab. But, they are very loud for the drivers and neighborhoods behind me.
They may be bordering too loud, but I don't mash it too much. They are somewhat docile in low throttle/low load, I am guessing because of the length of exhaust and small diamter (2"). Quite raspy at higher RPM WOT.
I like them.