I have a 94 LS/GS with a jdm GSR swap. I see that there is a difference in exhaust systems when trying to order one. Do I stay with the LS/GS system? Whats the difference with the LS/GS vs the GSR system?

 

All you need to do is get a exhaust to match your car. If you have a 2 door get a 2 door exhaust and vise versa. Then get a adjustable test pipe problem solved. Be sure once you get the test pipe fitted to weld it up or else it can slide apart on you.