I have a JDM 4-1 and from what I've seen around is that the length will be right but is the cat outlet 2.5"? Will it bolt to the stock piping?

I understand that the jdm header has no O2 sensor but I will be running hondata so hopefully that will not be a problem.

 

i dont think so.

 

AFAIK 98+ jdm itr header does have an o2 bung. The jdm cat does not.
Not sure if the jdm cat exit will bolt to a usdm itr b-pipe, but I know it won't bolt to a smaller diameter ls or gsr b-pipe.
Which b-pipe do you have?

 

Are you sure it will be the good lenght because te jdm cat is shorter tna the USDM

 

I have ITR b-pipe.

The jdm header is longer than the usdm one. Can anyone confirm if this will fit?

 

It might fit diameter wise, but length is most likely different. Welding is probably required.
I got a jdm itr b-pipe from passwordjdm.com to bolt up to my dc sports jdm 4-1 header, jdm itr cat, and usdm itr muffler.

 

Lookin to keep a low profile on the exhaust note huh?

 

Was it direct fitment?

 

Looking to save some money for now.

Does anyone know for sure? Right now it seems that jdm header + jdm cat + jdm bpipe = win?

 

Yeah, got a ticket for a apexi wsii.
DC sports jdm 4-1 header->jdm itr cat->jdm itr b-pipe->usdm itr muffler is a direct fit, bolt up affair. It will only have 1 o2 bung in the header, so another o2 bung will have to be welded on somewhere after the cat for obd ii.

 

Where did you get your jdm cat? And did you leave it as is or hollow it out?

 

I got mine from another member through the Honda-Tech For Sale forum.
Passwordjdm.com also sells them and the other parts of the jdm itr exhaust (header, b-pipe, muffler).

I left the cat as is to pass emissions.

 

It was used though right? I plan on buyin one for my setup, i just want it to be a real suttle exhaust note. Im trying to get away from it soundin raspy.

 

Hi guys, Im a newbie. Nice to join this forum.

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