depends on what header your using, you need to find a cat and a mid pipe that will connect to your header as well as follow the exhaust canal under your car. im not sure how different the 92 civic is fromt he gsr but you shoudl look into a system for each car and see if people have pictures or have already dont this swap. im sure there are people out there who have thats not very rare. but if you do go for a custom exhaust dont go bigger then 2.5" with all mandrel bends not kinked bends. and please put a resonantor on your midpipe. youll be very upset witht he sound if you run a straight pipe from your cat to you muffler.