Did y'all go with 2.5 or 2.25? Also which brand x pipe did you go with?

 

Hello! I did 2.25" piping with my whole set-up. So 2.25" inlet/outlet x-pipe. I forgot what brand I got but it was an ebay vendor that specialized in metal piping, they had an actual website too. But essentially you can get a nice quality x-pipe from many places. (I didn't get a stainless steel one because I didn't think that justified 2x price at the time I was looking back then) but they look fairly affordable now.