I just read something related to the itr headers will not fit a gsr w/out modifications due to the fact the itr header is 4 inch longer than the gsr stock headers... I have a four dr. GSR and they are four inch longer than the 2dr. GSR. I wonder can I put on the itr header and move the catback back 4 inch and put on a 2dr. Apexi N1 catback? Since the 2dr. GSR catback is 4 inch too short to connect to 4dr GSR. I wonder can I se the 4 inch off the itr header and move it back where it will fit with my catback? Hope you guys understand what I am saying.. Correct me if I a said something wrong. Thanks

 

 

Kick *** pic... so you can use an itr header on a gsr? Just kidding ha ha ha Looks pretty apparent.

 

I know it's longer, but I wonder can I used the itr header with a shorter catalytic converter? Or maybe someway I can install it.. I would appreciate it if someone can give me some advice because I can it the jdm itr header for $75 bucks. Thanks again

 

go to the muffler shop and have them cut down the piping a little bit and it will be fine

 

I wonder since it is a JDM itr OEM exhaust manifold. Can I smog with that header without being notice?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95GSRBOI &raquo;</TD></TR><TR><TD CLASS="quote">I wonder since it is a JDM itr OEM exhaust manifold. Can I smog with that header without being notice?</TD></TR></TABLE>

Just get the heatshields for it, you should be good then.
And if the header is Only $75 .. get it and Make it work even if you don't have the right cat.

 

ive seen itr headers go for about 300, so if your getting one for 75 then you better buy it even if it doesnt fit...

 

it's the 97 jdm itr 4-2-1 header. I believe.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95GSRBOI &raquo;</TD></TR><TR><TD CLASS="quote">I just read something related to the itr headers will not fit a gsr w/out modifications due to the fact the itr header is 4 inch longer than the gsr stock headers... I have a four dr. GSR and they are four inch longer than the 2dr. GSR. I wonder can I put on the itr header and move the catback back 4 inch and put on a 2dr. Apexi N1 catback? Since the 2dr. GSR catback is 4 inch too short to connect to 4dr GSR. I wonder can I se the 4 inch off the itr header and move it back where it will fit with my catback? Hope you guys understand what I am saying.. Correct me if I a said something wrong. Thanks</TD></TR></TABLE>youll probably have to shortent he B pipe

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95GSRBOI &raquo;</TD></TR><TR><TD CLASS="quote">it's the 97 jdm itr 4-2-1 header. I believe. </TD></TR></TABLE> i thought all of the itr's headers were 4-1

nvm..looked at the pic up top again..im an idiot..haha

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20integrapower &raquo;</TD></TR><TR><TD CLASS="quote"> i thought all of the itr's headers were 4-1

nvm..looked at the pic up top again..im an idiot..haha</TD></TR></TABLE>

thats a USDM ITR header, all JDM ones are a one piece design

 

Even if you get the length to work, you will still need a new 2.5" flange on your cat or your testpipe to get it to work. The JDM ITR has a 2.5" collector, and the cat is built for the smaller stock collector.

 

Couldn't you buy a ITR exhaust, plug the 02 bug on the cat and fit the ITR 4-1 header on that way? Reason I ask is because that's what I'm thinking about doing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wannaTypeR &raquo;</TD></TR><TR><TD CLASS="quote">Couldn't you buy a ITR exhaust, plug the 02 bug on the cat and fit the ITR 4-1 header on that way? Reason I ask is because that's what I'm thinking about doing </TD></TR></TABLE>

Nope, stock cat would be the limiting factor in that scenario. USDM Integra cats have a smaller flange to mate up with the crappy 2" collector on our USDM exhaust manifolds. An ITR exhaust is the same length as any 94-01 LS/GS/RS/SE or 00-01 GSR exhaust. I think you guys are getting too caught up in exhaust length and a-pipe length differences between the 94-99 GSR and JDM ITR, and aren't thinking about the different diameter collector (which is the whole reason you get a JDM ITR exhaust over some generic 4-1 USDM exhaust).

Regardless, it's something any decent welding shop can do in a heartbeat, so just buy your JDM ITR header, test mount it on the car, take some measurements, have them do a new 2.5" flange on your stock cat, or get a 2.5" highflow cat from kteller or SMSP or whoever, and get your exhaust shortened or lengthened as needed. If you have a 94-99 GSR, your exhaust is longer to compensate for the shorter a-pipe so you will need to cut a bit off (the OP may not need to because he has a 4-door). As for the o2 bung, for obd1 cars (94-95), just use the one in the JDM ITR and buy a 2.5" high flow cat with no o2 bung (or plug it up).

 

what if i get the entire JDM ITR exhaust system? headers all the way to the muffler&gt;

that would solve the problems of short or long pipes right&gt; I just need a hiflow cat right cause the 94-97 gsrs dont have the second o2 sensor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Solscud007 &raquo;</TD></TR><TR><TD CLASS="quote">what if i get the entire JDM ITR exhaust system? headers all the way to the muffler&gt;

that would solve the problems of short or long pipes right&gt; I just need a hiflow cat right cause the 94-97 gsrs dont have the second o2 sensor?</TD></TR></TABLE>

Actually, only the 94/95 GSR had a cat with 1 o2 sensor bung, 96-99 had 2 in the cat, 00-01 GSR has 1 in the cat and 1 in the collector, like the JDM ITR. So, depending on the year of car, you wouldn't need a high flow cat. I don't really see a purpose though, the ITR exhaust, although slightly better than the GSR, is still fairly restrictive and often just as expensive as getting an aftermarket exhaust.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMdc2lsVtec &raquo;</TD></TR><TR><TD CLASS="quote">

thats a USDM ITR header, all JDM ones are a one piece design</TD></TR></TABLE> i knew i wasnt crazy!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by purplegsr &raquo;</TD></TR><TR><TD CLASS="quote">

Nope, stock cat would be the limiting factor in that scenario. USDM Integra cats have a smaller flange to mate up with the crappy 2" collector on our USDM exhaust manifolds. An ITR exhaust is the same length as any 94-01 LS/GS/RS/SE or 00-01 GSR exhaust. I think you guys are getting too caught up in exhaust length and a-pipe length differences between the 94-99 GSR and JDM ITR, and aren't thinking about the different diameter collector (which is the whole reason you get a JDM ITR exhaust over some generic 4-1 USDM exhaust).

Regardless, it's something any decent welding shop can do in a heartbeat, so just buy your JDM ITR header, test mount it on the car, take some measurements, have them do a new 2.5" flange on your stock cat, or get a 2.5" highflow cat from kteller or SMSP or whoever, and get your exhaust shortened or lengthened as needed. If you have a 94-99 GSR, your exhaust is longer to compensate for the shorter a-pipe so you will need to cut a bit off (the OP may not need to because he has a 4-door). As for the o2 bung, for obd1 cars (94-95), just use the one in the JDM ITR and buy a 2.5" high flow cat with no o2 bung (or plug it up).</TD></TR></TABLE>

Correct, sorry i forgot to mention the purchase of a new cat. But my main question was really, are the hangers and mounting points all the same on the non 94-99 integras as those?

 

i cut my piping something like 4-4 1/2 inches and it fits great.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wannaTypeR &raquo;</TD></TR><TR><TD CLASS="quote">

Correct, sorry i forgot to mention the purchase of a new cat. But my main question was really, are the hangers and mounting points all the same on the non 94-99 integras as those?</TD></TR></TABLE>

Yes, hanger location is the same throughout the years.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by purplegsr &raquo;</TD></TR><TR><TD CLASS="quote">Actually, only the 94/95 GSR had a cat with 1 o2 sensor bung, 96-99 had 2 in the cat, 00-01 GSR has 1 in the cat and 1 in the collector, like the JDM ITR. So, depending on the year of car, you wouldn't need a high flow cat. I don't really see a purpose though, the ITR exhaust, although slightly better than the GSR, is still fairly restrictive and often just as expensive as getting an aftermarket exhaust. </TD></TR></TABLE>

oh ok. I have 94. So I guess if i got the jdm header i would jsut need to have the muffler shop cut my exhaust shorter to fit the header?

 

yes, and you would need a high flow cat with no o2 bung and a 2.5" flange for the collector. Or you could use your stock cat, have them add a 2.5" flange to one side, and use that - but then you're just introducting bottlenecks, and if you're going through the pain to do all this, you might as well make your system as free from restrictions as possible.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20integrapower &raquo;</TD></TR><TR><TD CLASS="quote"> i thought all of the itr's headers were 4-1

</TD></TR></TABLE>


actually the jdm 96 spec is 4-2-1 cast design. the jdm 98 spec is the 4-1 steel design. So no...all JDM ITR headers are not 4-1