I have searched and still can't find a for sure answer. I will be installing a jdm header soon and need to know wether or not my ITR cat will fit. I just put a 2.5 in exhaust on tonight with no problems, but I've heard they're may be problems with the length of the cat, ect.

I ordered a flange from Inline-four. They told me all I would need to do is get it welded on my stock cat and it would bolt up fine. I only have a few weeks til nopi, so I would like to know what I need so I can plan on getting it asap. Also, will any highflow cat work, and if so/not what length does it need to be?

Thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98Itr-0448 &raquo;</TD></TR><TR><TD CLASS="quote">I have searched </TD></TR></TABLE>
Nope, you didn't.

This thread is one page over and a day old

https://honda-tech.com/zerothread?id=976215

 

I am not 100% but I think that they make a small piece to go between the header and the cat. IPS racing or R and D sells it I think but I am certain that the JDM header will NOT bolt directly to the stock cat.

 

as long as the exhaust you put on didnt move the location of the cat, ie shove it back towards the engine, then a JDM header will fit ok, but if you are using the stock cat then you will have a bottle neck at that point. JDM headers and USDM headers are the same dimensions/lenght, its the cat lenght that differs between JDM ITRs and USDM/UK/Euro ITRs.

 

I dont get how people can afford a JDM header but no cat or cheap test pipe. Why even put the JDM header on.

 

actually I did search and lots of people reccomended a high flow, but no one said for sure wether or not the usdm would/would not fit. Oh and your reply was about as pointless as an exhaust silencer.

 

I can buy one, just didn't want to if I don't have too. Do you throw away money? If so, I'll take yours.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98Itr-0448 &raquo;</TD></TR><TR><TD CLASS="quote">I can buy one, just didn't want to if I don't have too. Do you throw away money? If so, I'll take yours.</TD></TR></TABLE>

Bolting the JDM header up to the stock cat make it almost pointless to upgrade. There is a 100 dollor godspeed testpipe for sale in the classifieds, which will bolt everything up fine, and yield better power from the JDM header, and make a few HP itself.

 

can you do a test pipe without a check engine light problem?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98Itr-0448 &raquo;</TD></TR><TR><TD CLASS="quote">can you do a test pipe without a check engine light problem?</TD></TR></TABLE>

With the godspeed one you can, it has an 02 bung with cat material that tricks the O2.

 

The stock catalytic is a HUGE bottleneck, so bolting up a 2.5" header with the puny restrictive catalytic doesnt make sense now does it? Save/spend an extra 80-100 bucks and find a nice used 2.5" Carsound cat.

 

that sounds cool, are they pretty reliable? Where in classifieds? I skimmed through it but didn't see anything.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98Itr-0448 &raquo;</TD></TR><TR><TD CLASS="quote">that sounds cool, are they pretty reliable? Where in classifieds? I skimmed through it but didn't see anything.</TD></TR></TABLE>

https://honda-tech.com/zerothread?id=776312

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98Itr-0448 &raquo;</TD></TR><TR><TD CLASS="quote">that sounds cool, are they pretty reliable? Where in classifieds? I skimmed through it but didn't see anything.</TD></TR></TABLE>

they don't last for long time, so i suggest you buy it new.. unless seller has one with low milage

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by opie &raquo;</TD></TR><TR><TD CLASS="quote">Nope, you didn't.

This thread is one page over and a day old

https://honda-tech.com/zerothread?id=976215</TD></TR></TABLE>

"Checkmate"

Hahahahahhaaha


Just change the damn flange size on the piping on the cat so it fits. How simple is that? DUh??
Get a high flow cat, its better.

 

If you notice I replied to that thread and asked the same question. I didn't get much of an answer so I posted myself. I'm sure that was overlooked in the attempt to be a fireman "flamer."

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Champ R &raquo;</TD></TR><TR><TD CLASS="quote">nice used 2.5" Carsound cat.</TD></TR></TABLE>

Is there really such a thing as a "nice" carsound cat?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jond &raquo;</TD></TR><TR><TD CLASS="quote">Is there really such a thing as a "nice" carsound cat?
</TD></TR></TABLE>

Good question

My $50 Jeg's universal 2.5" cat worked great. Unfortunately, they cost more like $150 now.

Has anyone tried to get a hold of an real Honda JDM cat to use with these headers?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Splat &raquo;</TD></TR><TR><TD CLASS="quote">Has anyone tried to get a hold of an real Honda JDM cat to use with these headers?</TD></TR></TABLE>

I acquired one from a friend. My JDM ITR cat (O2 bung already welded on) is for sale also if anyone wants it.

 

free???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BrewCityR &raquo;</TD></TR><TR><TD CLASS="quote">I acquired one from a friend.</TD></TR></TABLE>

Curious - does it mate to the factory (US) b-pipe or is it too long?

 

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

Is there really such a thing as a "nice" carsound cat?


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

I know some people have had some problems with them, but i bought a used SMSP Carsound with 10k already on it, and in turn i used it for another 9 months with no problems.

 

i fried my carsound cat and have CEL now
but it goes away as soon as i flush obd2
how are the godspeed test pipe?
still debating if i should get one or not.........

 

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

Curious - does it mate to the factory (US) b-pipe or is it too long?
</TD></TR></TABLE>

JDM ITR cat is shorter than USDM cat. I was going to have my JDM header and cat mated to my OEM B-pipe. I would think a 2.5" flange would need to be welded to my B pipe.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xc1097 &raquo;</TD></TR><TR><TD CLASS="quote">i fried my carsound cat and have CEL now
but it goes away as soon as i flush obd2
how are the godspeed test pipe?
still debating if i should get one or not......... </TD></TR></TABLE>

What the hell does flush OBD2 mean?