Has anyone tried these? There is a single 2.5 double 2.5 muffler available, and from everyone says at work, they are quiet until you get on them. Then they are LOUD. I like the magnaflow, but am also considering these...

 

A buddy of mine has a 77 Y82 Trans Am w/Dynomax mufflers on it.
It is not really loud, but when you get on it, they really seem to open up.

 

my friend has a 67 cutlass thats nowhere near stock (makes 500+hp with a BBC) and thats what he has.. I'm just curious as to how they would sound on a puny 3.2 v6.. maybe Ill just give them a try.