I have searched, got a few half answers !!!!!

I have just purchased a USDM 97-01 ITR 4-2-1 Comptech header.
I have a 1994 JDM SiR Integra.
What I want to know is

Which Omni Test Pipe should I get

1. The JDM Integra 94-01 (will this bolt up to the 2" collector on my comptech header?, should be no problem bolting up to my 2.25" exhaust)

2. The USDM ITR 97-01 (will this bolt up to my 2.25"exhaust? , should be no problem bolting up to my comptech header)

Im kinda guessing that both will do the job, and if they do, which would be the better choice (if any) in realtion to going from 2" to 2.25"diameter.
i.e Should i go to 2.25" at the collector or at the end of the test pipe/start of the exhaust.

Hope this isn't to confusing, but i'm caught between the two and just want to make sure which will work/be better.

Thanks

 

This is probaly no the answer you are looking for, but i would suggest just going to your local muffler shop. I am sure they could help you out

 

I would, but they charge crazy money for small jobs like that over here in Ireland, plus I will have to go open header to the shop, Police over here would impound my car straight away if they heard me driving around like that.
Thanks for reply though

 

no you can just bring the car in and they'll remove the cat, make u the pipe, and put the cat back in.

i think the usdm one would most likely fit, because 2.25 exhaust can fit on the stock cat, which is 2". so if u get the usdm one, it should fit. the 2.5" version may or may not bolt up to the comptech but probably only the exhaust.

 

I wont be running my car wih a cat, plus Im using a ITR Comptech 4-2-1 which is a bit longer than the GSR one (got it for a good price).
The Omni test pipe has adjustable length so this is why im going this route.

 

bump for some help !