Are F22/H23 parts interchangeable?

[bboy-cb7]

I have a H23 swap in my 92 Honda Accord EX. It has the stock h23 header, and the 92 accord intake manifold.

The previous owner said the reason why he didn't put on the H23 intake manifold was because it didn't fit or would hit the firewall. Is this true? If not, will the H23 intake manifold yield more power if I swapped it?

I remember reading online that F22 and H23 parts are interchangeable. Are there any aftermarket F22/H23 intake manifolds made? If so, where can I find them?

I'm also thinking of getting a f22 header/catback combo from ebay. But I don't know if the f22 header will fit to the H23. I've read many forums online about it, some say it doesn't and some says it does. I need someone to clear this out for me.

Thanks!

[MikeW]

Intake Manifolds are. I also believe Throttle Bodies are as well.

[deevergote]

The throttle body is not interchangeable between the manifolds, and it would be necessary to have the H23 throttle body on the H23 manifold.

However, the H23 manifold absolutely WILL fit... if it doesn't then the chances are that the entire engine is installed incorrectly. The guy you bought the car from doesn't seem like he knew what he was doing... and you could have a whole bunch of things waiting to fail on you!

The F22 manifold is a serious bottleneck for the H23. You will notice a considerable difference by using the proper H23 manifold.


Is your engine leaning to one side, by any chance?

[theSOB]

the transmissions are also interchangeable

[MikeW]

Plenum.

[theSOB]

Plenum.

the plenum from the h23/h22 are only interchangeable with the f22a6 manifold. it will not fir on the a1/a4

[MikeW]

Well, he hasnt said which engine he has yet...

[MikeW]

He has an h23 in a 92EX. That WAS f22a6, but he's running the f22 IM. He has an H23, why not run an H23 IM?

[theSOB]

He has an h23 in a 92EX. That WAS f22a6, but he's running the f22 IM. He has an H23, why not run an H23 IM?

you need to read, he said he got the car like that. the original owner said the h23 IM wouldnt fit. he's wondering if he can change it. deeve already told him to run the h23 IM and that it should fit.

[bboy-cb7]

The throttle body is not interchangeable between the manifolds, and it would be necessary to have the H23 throttle body on the H23 manifold.

However, the H23 manifold absolutely WILL fit... if it doesn't then the chances are that the entire engine is installed incorrectly. The guy you bought the car from doesn't seem like he knew what he was doing... and you could have a whole bunch of things waiting to fail on you!

The F22 manifold is a serious bottleneck for the H23. You will notice a considerable difference by using the proper H23 manifold.


Is your engine leaning to one side, by any chance?

Thanks deeve. I don't believe the engine is leaning. It looks like a really clean swap. I'll post up photos of it when I have time so you guys can look at it

[bboy-cb7]

does anyone know if the f22/h23 exhaust manifold are interchangeable?

[theSOB]

does anyone know if the f22/h23 exhaust manifold are interchangeable?

yes

[bboy-cb7]

also would it matter if the H23 manifold is for auto or manual?

[theSOB]

i think the only difference is in the tb. the AT tb has an extra piece

[StinkinLincoln]

does anyone know if the f22/h23 exhaust manifold are interchangeable?

yes they are!!