Opinions on exhaust

I love my glasspaks! As I mentioned before, I just have the Summit brand ones, they're awesome. Not tinny or raspy at all just good old rumble. As far as flow goes, I imagine it'd be pretty comparable to other straight through mufflers, there really isn't much in there to restrict flow at all, just the little louvre looking things to vent to the packing material, and they're so small I doubt they cause much restriction. I'll have to see if I can figure out a way to do a sound clip...