Hey everyone. I have a 2015 Gt with a P1sc1, 18 mani, supporting mods etc. I currently have factory headers 3" cat delete, x pipe and muffler deletes. From the x pipe back is 2.5". I'm trying to maximize my setup and I imagine that the 2.5" is holding me back. I'm thinking about getting a 3" cat back set up to go with the 3 " cat delete. Are you boosted guys running 3" all the way? What cat back setup would you recommend? Would it be beneficial to get 1 7/8 long tubes? Any opinions and suggestions are appreciated!