ive been having a few exhaust problems. first im using ls header on a gsr so we had to pull them real tight to make ends meet and witht the help of a bracket it worked. the last few nights it seems to b opening up again. now i have a chance to get the cat from a gsr that has the o2 in it. can i run that with the gsr header. in fact i can get the stock exhaust will that fit on a 93 hatch? all help is needed.