I have dual Smithy's on both of my cars and while they are loud I think the old Thrush's were louder. Smith'ys are more of a civilized loud.

Smithy's are also much better sounding on a big block like my Olds 371. That's when they are at their peak in sweet hotrod sound. Not bad on a small block like in my 34, but not as good as on a big block car. Just my .02