i have a 99 gsr integra coupe will a catback system off a 2000-2001 integra gsr 2dr coupe fit my 99 gsr with no problem??? thanks

 

No

It wont fit without some sort of modification.
You can either extend the B-pipe by 4 1/2" or use a longer header and cat off various 94-01 Integra models.

 

catback is universal for 94-01(would fit 4door too, just need to add a extended b-pipe). header to cat, different story.

 

did i miss read something? was op talking about 4door?

 

Not that, I was just dealing with this my self less than a week ago.

Check my thread
https://honda-tech.com/forums/acura-integra-6/blown-cat-question-3060423/

In a nut shell, 94-01 LS/RS/RS/ITR/00-01 GSR use a longer header and cat with shorter catback system.

94-99 GSR have longer catback system to compensate for having a shorter header/cat.

 

true

To the OP:
If you want that exhaust you need the whole exhaust from header to cat

 

good to know. for got to correlate the header issues and including the cat back difference's too.

 

Not nessessarly, all though that isn't a bad idea.

If the exhaust is new or in good condition you can simply modify the length as I did. You would just need to consider he cost of welding and material into what you paid for the exhaust.

 

It wont fit without some sort of modification.

 

thanks for the help guys