The previous owner of my car said that he thinks the exhaust system will need to be replaced within a year. I already ordered headers to replace the exhaust manifold that was there (which I will admit, looks in awful condition). I took a peek under the car though, just to look for anything awful looking with my exhaust pipes. I didn't see anything awful looking (to the untrained eye). Then again, I didn't really crawl under there either. It passed inspection without any difficulty. Not sure if NH does emission tests or not, but he didn't say anything was wrong and my car's exhaust doesn't smell at all, so I assume my catalytic converter is working well.
I was going to get the car up on jack stands to change the oil anyways, so I figured I would take a look at the exhaust system. What is it that I am supposed to be looking for, to warrant it's replacement?