Exhaust ?

Hi I guess im new to this forum. I just got a 2001 sebring limited conv't. I got it used from a neighbor. I was looknig at the exhaust and it appears the the rear muffler and some of the exhaust connected to it have been taken off. I would like to just get somthing so it is quiter. So if anayone knows the size diameter of the factory exhaust piping please let me know.