OBX makes headers for my 2003 V6 Accord. According (no pun intended) to the pictures on their website, they do not have the three cats that my stock manifold has or the 4 O2 sensor holes. I have to guess that they are not street-legal and would take some modding to accommodate a new O2 setup.

Does anyone have experience with this particular setup who can confirm or deny my assumption? Give suggestions? Tell me not to bother?

 

Ugh, stay away from OBX.

I bought a header for my car when they were a new company and the flange warped within a year. Alot of people do not like their products.

 

Yeah, I have heard mixed things about OBX headers. My ultimate goal is to improve flow in my exhaust to take full advantage of a CAI. I am not looking for any difficult mods or anything emissions-illegal, so I have a feeling I will have to forget about headers.

 

Their website is wrong. You can't put headers on an 03-04 V6. None of the pictures they show would fit on your car.

 

To explain my above post (this has been covered all over the place on this forum):
There are no manifolds to remove and replace with a header. The exhaust ports are combined inside the head. So what you bolt onto the head amounts to just the collector.
Here's a pic if a J30A4 cylinder head: