Hey I have been reading this fourm for a while and I really like it and all the info on it. I have searched the fourm and not found anything on this topic so I am going to ask. I have a 2001 Accord Ulev and it has the O2 sensor or something going into the headers. I have looked around but have not found any aftermarket headers that have the opening for this. I was wondering if anyone could help me with this or just any info about the f23a4. I have found info on the f23a1 and I think they basically are the same motor but I am not 100%. Thank you in advance for the info it is greatly appreciated. I am sorry if this has been posted before.

 

i believe you have a header that is cast into the block and you can't change it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sony224422 &raquo;</TD></TR><TR><TD CLASS="quote">i believe you have a header that is cast into the block and you can't change it. </TD></TR></TABLE>

What do you mean? That the block and header is one piece.
Thats not the case, you can chage headers on a F23. Theres no such thing as a header cast onto a block on engines. Well at least not on the F23 that I have.

As for as the sensor goes, usually when you get an aftermarket header it will have an sensor bung on it. Usually a litter lower than the stock one. Maybe near the collector. I guess it depends on the manufacturer. Hope that helps.

 

i recall an accord that has a non removable header.

 

only on the f23a5 engine only (dx) model. the exhaust manifold for the f23a4 is removable. dc sports makes headers that the original o2 sensor can fit. a few other headers also have the o2 sensor for it. you just have to searched. i believe airmass headers and maybe chikara headers.

 

The f23a5 header is removable. I do not think Honda used a cast header till the 7th gen. Accords, and that might only be on the v6 models.

 

ahh hmm i wonder if thats what i was thinking of. sorry for the confusion

 

Currently, own a 99 Accord Sedan 2.3l i4 auto tranny f23a4 ULEV did anyone ever find a good header? Currently rocking a $80 ECCPP header which is more than likely some eBay drop shipped item but also a Yonaka catback with a gutted cat (because I can't find a test pipe either smh)