I am about to replace my exhaust on my 91 honda accordfrom the cat back! I would like to know what is the size of the diameter of my exhuast. I don't know if it is a 2 in or 2.25 in. I know a guy who is selling his muffler. It has a 2.5 inlet. What do I need to do to get this to fit on my car? Is this possible to do?

 

You can get adapter pipe fittings at any auto parts store. A muffler shop would also have the fittings. Just have them weld the parts together for this kind of setup.