differences?

inner diameter?

etc.

 

b-pipe lengths....the JDM will have a longer b-pipe and shorter cat

-Alan

 

back from the dead
after 45 minutes of searching now...
i haven't gotten my question answered..

is the jdm itr axleback/b-pipe 2.38 ID, and the USDM 2.25? or are they the same,
except for b pipe length? i keep hearing different stories

 

its a good thing i accidentally deleted the post i wrote.

 

I'm pretty sure they are the same size pipe Dia, but I doubt anyone will disagree

 

anyone ever confirm this?

 

usdm itr 2.25 dia piping.
jdm itr 2.50 dia piping. jdm itr header seems shorter than my usdm by about 4 inch (i think) to the cat. found out the hard way. had to put an omnipower test pipe.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rjgerolaga &raquo;</TD></TR><TR><TD CLASS="quote">usdm itr 2.25 dia piping.
jdm itr 2.50 dia piping.</TD></TR></TABLE>



NO.

Both USDM and JDM exhausts are the same diameter and have the same bottlenecks. The only difference is the length of the b pipe.

 

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

Both USDM and JDM exhausts are the same diameter and have the same bottlenecks. The only difference is the length of the b pipe.</TD></TR></TABLE>
/Thread

 

It's a 4.5" difference in lenght, the USDM exhaust is shorter. When I was waiting for my JDM Mugen Twinloop, I made a short test pipe to bolt the USDM ITR exhaust up to my JDM Kakimoto testpipe which has the same dimensions as the JDM cat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rjgerolaga &raquo;</TD></TR><TR><TD CLASS="quote">usdm itr 2.25 dia piping.
jdm itr 2.50 dia piping. jdm itr header seems shorter than my usdm by about 4 inch (i think) </TD></TR></TABLE>

Edited...Don't mind me...I must have been seeing things or something but I thought we were on the subject of exhaust manifolds...opps wasn't thinking right at the time. Anyways don't know the difference between JDM & USDM.


Modified by BucLao 1.8L R at 9:14 PM 12/18/2005

 

I just measured my USDM ITR exhaust B-pipe and the outer diameter is 2.25in. I believe the JDM ITR exhaust B-pipe is 2 3/8in diameter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM_teh_WIN!! &raquo;</TD></TR><TR><TD CLASS="quote">I just measured my USDM ITR exhaust B-pipe and the outer diameter is 2.25in. I believe the JDM ITR exhaust B-pipe is 2 3/8in diameter.</TD></TR></TABLE>


Correct...my 96spec ITR b-pipe is 60.5mm OD (2.38")

 

ha..funny i started this thread awhile ago..

now i have a full jdm itr catback on my car.

the axleback is different too..with the jdm itr tip sticking out more..
and the muffler portion looks bigger.


edit: notice how the tip goes out past the bumper (sorry, hard to tell from the angle but it does) in the following pic:

 

I think it's sticking out cause you have the wrong length cat therfore causeing the exhaust to be too long.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B2FiNiTY &raquo;</TD></TR><TR><TD CLASS="quote">I think it's sticking out cause you have the wrong length cat therfore causeing the exhaust to be too long. </TD></TR></TABLE>

you couldn't be more wrong. i don't even have a cat.
i have a custom made testpipe that connects my jg edelbrock header w/2.5 modded collector to the jdm itr catback.

i have seen both side by side. but if you think you're the only one with a decent pair of eyes and a brain that works i guess you might be right lol

 

A JDM ITR header, cat, b pipe and axleback is the same exact length as a USDM ITR header, cat, b pipe, and axleback.

Therefore, your header and cat combination must be longer than a JDM ITR header and cat, which is pushing your exhaust further out than it should be.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Reid &raquo;</TD></TR><TR><TD CLASS="quote">A JDM ITR header, cat, b pipe and axleback is the same exact length as a USDM ITR header, cat, b pipe, and axleback.

Therefore, your header and cat combination must be longer than a JDM ITR header and cat, which is pushing your exhaust further out than it should be.</TD></TR></TABLE>

OMG another one.

i'll just take a pic of it side by side and post it for you ignorant folk.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EVOL &raquo;</TD></TR><TR><TD CLASS="quote">for you ignorant folk.</TD></TR></TABLE>

Are you ******* kidding me? No seriously, you're joking right?

 

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

OMG another one.

i'll just take a pic of it side by side and post it for you ignorant folk.</TD></TR></TABLE>

Better yet, measure everything and stop acting like a clown.

 

what i really want to know is if there's a difference between a 96-97 and 98+,

my last itr exhaust sat higher than my current one?

 

Yeah, I think your test pipe is the reason why your exhaust extends about 1" more than it should. no worries though..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SilverDc2 &raquo;</TD></TR><TR><TD CLASS="quote">what i really want to know is if there's a difference between a 96-97 and 98+,

my last itr exhaust sat higher than my current one?</TD></TR></TABLE>
that MIGHT be due to your exhaust hangers..i had the same problem when my friend hooked them up on the wrong chassis hanger clip things.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1GreyTeg &raquo;</TD></TR><TR><TD CLASS="quote">

Better yet, measure everything and stop acting like a clown.</TD></TR></TABLE>

clown??

i'm the only guy who has seen both side by side..

all of you are just SPECULATING.

and i have owned an R before FYI to whoever said i don't own one.

 

I've never seen an ITR exhaust JDM or USDM stick that far out. What makes yours stick out when pictures of bone stock jdm 96 spec/98 spec itrs in Japan have perfect fitting ones?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EVOL &raquo;</TD></TR><TR><TD CLASS="quote">you couldn't be more wrong. i don't even have a cat.
i have a custom made testpipe that connects my jg edelbrock header w/2.5 modded collector to the jdm itr catback.

i have seen both side by side. but if you think you're the only one with a decent pair of eyes and a brain that works i guess you might be right lol</TD></TR></TABLE>

When you say you've seen both side by side, are you talking about just the catbacks? If so, I think what people are saying is that if you measure a JDM ITR header/cat/exhaust all bolted together against a USDM ITR header/cat/exhaust, you will find that they are the same overall length.