I'm sure someone will have asked this question before.. aftermarket websites usually list part numbers across various years too. Shouldn't be too hard to work out.
I put an FMF Gnarly Pipe for 2015-2016 250-300's on my 2004 ec200.. I had to weld a little piece on the mounting tab closest to the silencer for it to line up but that was easy enough, and I got the pipe brand new for $99 bucks so I'm still stoked!