exhaust QQ?????

i got an jdm type R engine im thinking about doing custom piping to a magnaflow muffler. i have a 2.5 header 2.5 cat and about to do 2.5 pip to an 2.5 inlet and out magnaflow muffler. i was just wondering is it going to be hella loud.

Probably, throw a resonator about halfway down the B pipe, it will quiet it down some.

do u think i should go 2.5 all the way or should i just do 2.5 header 2.5 cat and and do the pips 2.25 and muffler 2.25? how would u do it so it want be that loud. cuzz where i live police check your hood if they pull u over.