[Valley olds]

Sorry for stealing this thread, but I was wondering, does a single in dual out muffler serve any purpose besides looks? The way I see it, (please correct me if Im wrong) if you make a funnel top bigger, whatever you pour will only flow as much as the smaller side allows it. In other words, flow wise, it doesn't really matter that you've got two outlets, because the single inlet won't allow the two outlets to flow their true potential. This is why when I get an exhaust Im planning on a single in/ out and adding a tip with two outs for the looks. Anyways... like I said, if I am wrong please correct me so when I get the exhaust, I can get the right one.