Exhaust fitment
 

I couldnt really find a straight answer to my question online so ill ask here.

from what i've read Rs,gs,ls and type r's can have their exhausts swapped with no issues.

but is the gsr different in size or something? if so is there anyway of installing an exhaust meant for say a type r into a gsr (dc,2000)?

itr exhaust will fit a gsr, from the head to the tail-pipe.