The muffler is black, now.
This picture shows the soup-can cap I'm using to block off the right-side outlet to keep things quieter in city driving.
My question: is there any downside to blocking off one of the two outlets?
It's a Flowmaster 80 series model, which appears to have a common chamber that both inlets empty into. Here's an x-ray of the model I have, although I have two inlets instead of one.
Any thoughts?