I would not advise using a Camarro or Firebird muffler. I tried two of them and they were loud and did not have a good tone. I replaced them with a Borla which atually sounded more like stock but a little more throaty. I liked the Borla a lot but my wife objected. Actually I think you would object to any muffler other than stock. So I took the Borla off and put on the original stock muffler. I still have the Borla if you or anyone else would be intered in buying it at a good price.