I have for sale a Vibrant 3 inch muffler.
It is oval style and it has centered inlet/outlet. Been used for a month or so.
I had 2 of these on my Cavalier, one to replace my CAT and one in the place of the stock muffler, but it was so hard to have a 3 inch exhaust over the rear axle so I took it off and now it is sitting NOT being used.