I am stupid about these things. I already have the 2.5 high flow cat to fit the 2.5 inch collector, but will the top of the primaries bolt right on to my motor?Thanks

 

yes

but depending on what year GSR you have, the length might not be right

 

i have a 94 GSR. And thank you very much.

 

i think you need a longer cat to make it fit, lenght wise

 

Hey, I just put on an USDM ITR muffler. I want to get the rest of the ITR exhaust setup and bolt it on at once, rather that cut and fit and cut some more as I get each piece. I'm interested in the JDM setup. Where did you get your 2.5" cat? And did you have your 2.5" b-pipe custom made, or did you order it? Aren't US UTR pipes all 2.25 or something like that? I wonder if it'll bolt up to my muffler, or if I'll have to get the flange on the b-pipe modified?
I think the JDM header will bolt fine up to the modified cat/b-pipe/header combo without any cutting (which is what I'm trying to avoid), so long as you haven't already cut the b-pipe to fit the header you have right now (it's like 6" too short, I think).

 

Actually you need a shorter cat. 94 GSR has the 02 sensor in the cat. JDM ITR has the 02 sensor in the header.

I think they're about 3" longer than the GSR headers are.

 

B18c-EJ1, Your wrong both USDM and JDM have an o2 sensor in the header, all 3rd gen integra's have an o2 sensor in the header, its the 99-01 that have it in the cat. as well as in the header.

 

i think 96+ have the O2 in the CAT actually...

but he is right about the length, i had it backwards


[Modified by 01GSR, 3:07 PM 10/2/2001]

 

I have a 96 gsr and yes, there are 2 (O2) sensors in the cat.


[Modified by Scary1109, 4:17 PM 10/2/2001]

 

wait, TWO in the CAT?

should be one in the cat and one in the header

 

yes, mine has one on the headers side of the cat, and one on the exhaust side. if you have a helms manual it shows the gsr exhaust very clearly. i hope this helps.


[Modified by Scary1109, 6:16 PM 10/2/2001]

 

although, the original post is asking about a 94, that may have an OB1 system in it, then it would be different then what i have in mine.

 

the o2 sensor put into the header wasn't until '00+ models i believe

 

So will they fit on my 2000 Integra GS-R? What do I need to modify to get it to fit?

 

Chek my site for installation and info bout OEM JDM 4-1 on a 98 gsr.
Hope it helps

here a picture of it in the car before starting it up
it turned golden after



[Modified by MintyDip, 7:11 PM 10/2/2001]

 

any car you put it onto, your gonna have to get a diff cat

so there will be one hole in the header and one hole in the cat...for the two O2 plugs

if you have obd1, you'll just use the one in the header