i have the 4-1 itr header with no cataylic converter to a 2.5 tsudo catback. I'm having a hard time trying to find the right size and length. i saw some on ebay and most of them say like. 2.5 inlet and outlet. not sure if those would line up or fit onto my itr header and to my catback. any body know the correct size for the itr header. or is the 2.5 would work? i was thinking of something like this for now.......... http://cgi.ebay.com/ebaymotors...ZWDVW

 

Are you looking for a real cat or a test pipe ebay deal?

Also if there is a local muffler shop they can adapt in a few mins

Personally if you want a real cat look into catco.

 

Just take whatever cat (with no flanges) to your local muffler shop and have them weld it up.

But tell them to flange it between the header and cat, and weld it to the middle section of your exhaust.

Done.

 

any of you know. the difference in length between the integras and the crx.. like which caty is longer or shorter?

 

if you are upgrading your exhaust to 2.5" then buy some 2.5" flanges to bolt up the cat between the header and the exhaust..... Otherwise it will restrict some flow.