Thread: 2001 GTP Exhaust Muffler Size

I am going to get some 40 Seires mufflers and I was wondering if you all could tell me what the Inlet and Outlet size is for stock Pipes right now that is all that I have the dough for I am going to reuse the same tips they are in really good shape still. I have tried searching and someone thought that they were 2.5 Inch but noone ever confirmed. I just want ot be sure before I spend the Cash also our exhaust come in and out the center correct