I'm 99.9% sure about this, but I thought I'd ask before I gave the buyer a definite answer. I have my old GSR's muffler in the garage. A guy wants to buy it for his LS. Mine was a '94, his is a '97. Bolts right up, correct?

 

They do have different part numbers. I know that part for sure. The diameter of the piping may have something to do with that too.

 

this is from another thread

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlackSage &raquo;</TD></TR><TR><TD CLASS="quote">Stock Integra RS, LS, GS, SE, GS-R 1.91 - 2.0 48.6 - 50.8 Chambered
Stock Integra Type R 2.25 57.2 Chambered
Stock Integra Type R (JDM) 2.25 (ID) 57.2 (ID) Chambered

courtesy of team integra.net</TD></TR></TABLE>

which i am assuming he got it from this link on team-integra. i hope this helps you out.

http://www.team-integra.net/se...D=451

edit: here is another thread which looks like says they are different sizes
https://honda-tech.com/zerothread?id=987100

ls=1.81 inches
GSR= 2.09 inches
R= 2.36 inches

edit #2:
read this thread
https://honda-tech.com/zerothread?id=294033

 

So if I read that right, he'd just need to have a muffler shop shorten the b-pipe by a few inches?

 

you have the full exhaust? or just the muffler? i thought you were asking if the pipe diameter is the same size. sorry.

i am 99.9% sure that the GSR full exhaust will not fit on a LS.

GSR/=LS
however...
LS=Type R

 

Muffler only. One of the threads in the earlier post seemed to indicate it was just a matter of shortening the b-pipe a few inches?