On the B18C header going into the catalytic converter, it doesn't quite fit. Do I have to get some sort of a custom catalytic converter?

If so, where would I get one at?

 

Which b18c are we talking about? sirg or itr? Also what car is it in?

 

B18C that came out of a Integra going to a cat from a stock 93 EX exhaust.

 

What year header? What year cat? I know that the cat flange on different years rotated.

Do you mean the length? If so, the GSR header/cat won't meet up with the civic exhaust. You either need to have your exhaust lengthened to meet up with the cat or have a small shim-pipe made. Take it to a muffler shop.

 

94 Header JDM B18C going to a 93 EX. I think I will get this from landspeedracing. It sounds like it will do the trick to mate up to JDM headers.

http://www.landspeedracing.com/custo...cat=212&page=1

 

A muffler shop could fix everything for less. I paid $75 for a custom length cat and my exhaust installed.

 

oh well, i went ahead and ordered it. i'll let you know if it is direct bolt on.

 

I did a 2.25" test pipe and shortened it by 7/8" and it worked like a champ.