What header do I need for an F22a, meaning can I use an F22b1 or b2 or F23 or H23 or H22. Which of these share the same bolt pattern etc. Thanks for your help.

 

H23 header will fit just fine, you'll just have to make a wire extension to connect the O2 sensor

 

you can have my DC header for the f22a1 for a small price.

 

just get a f22a1 header or you can use a h23a1 header...f22b is SOHC VTEC that came in the Accord. Or if your talking about the JDM f22b which is just like the USDM h23a1...only with iron sleeves...

 

I just put an H23 header on my F22a.. it's not as easy as you expect.

It bolts on the block with ease, but you'll need a new downpipe/y-pipe and you'll need to extend the wires on the 02 sensor. I extended the wires on the h23 downpipe 02 sensor and IT DIDNT WORK the plug was different.

So you'll need to try and get the plug off the f22 sensor on the header and wire it to the downpipe sensor off the h23 with the extended wires of course.

Plus getting everything cut and welded.. I got lucky and got the header *Chikara btw* for 20 bucks, found a downpipe for 6 bucks at a junkyard, and paid 64 for labor. All in all 90 bucks and the diffrence is huge. It makes my car sound MUCH better and I can feel a HP gain after 2.5/3k RPMS.

Anymore questions just let me know.