What exactly are the differences between the GSR exhaust and the LS exhaust system? I found a guy with an LS (well SE) and we want to swap exhausts my DC for his stock. Is it a direct fit or is there some custom work involved? If so what? Thanks.

 

the ls catback will either be a tad short or a tad long at the cat.. i'm sure a muffler shop would help ya tack it on

 

94-99 gs-r and 94-01 ls exhaust are not interchangeble, due to the fact that gs-r's cat is longer than ls tegs ( i think you need a longer b-pipe).
00-01 gs-r ans 94-01 ls tegs are interchangeble though.