Exhaust Question???

[buechine]

Hi guys, I am trying to change my factory muffler and put on a replacement one, the question I have is what size is the pipe before the muffler? 2", 21/4? Thanks

 

[philallemang]

i have a 90 and it is 2 1/4 inch. i just replaced the resinator the other day that is how i know.