Ok so to put a header on my HX I will need to use a EX header, EX cat, and an EX catback? I already have a catback on the car so do I replace the A pipe with a cat and some sort of extension? Also as far as the o2 sensors go do I extend both with one before and another after the cat? I know this is not rocket science, I just need someone to tell me the right way to do it.

 

just buy a header for the hx motor

 

well you wouldn't need an extension because the HX/DX catback is longer than the EX catback. you would need to do some fabrication. i was planning to get a DC header just for kicks and since the DC header has an o2 bung on the header, i would place one o2 sensor on the header and the other in the cat.

 

But if I use a ex header there will be no room for a cat. Also is there a o2 sensor bung on the ex headers? Any other ideas?

 

search "sensor header"

seen some people extend there o2 sensors and let it hang under the intake manifold, but that would lead to people running rich.

 

the EX headers I've seen have only one o2 hole. The easiest (and most expensive) way to go is to get an EX header, cat, and exhaust. But because you already have a cat-back, I would just get an ex header and have a muffler shop cut out a section of the cat-back to make room for the cat.

Make sure the cat has on o2 bung on it too. Carsound makes them and K Teller has them too.

BTW, I have a Pacesetter header for sale CHEAP! pm me if your interested.

 

dc header for sale.