Originally Posted by A_D
if you've ever looked at any sites that sell JDM honda engines, you'll see that the f22b DOHC does indeed exist. they're not that hard to find. the f20b isnt' the only DOHC f series engine to ever exist.
but, since it is JDM, and not USDM, you're not going to find a DOHC f22 that is USDM. that would be i believe an h23 (usdm). i think that the USDM f22 and the USDM h23 have the same bottom end. aside from the obvious .1 liter difference in the bore. i think they have the same crank/rod assembly. or so i've read on here before.
anyway, back to the topic at hand, i'm not sure if the exhaust manifold bolts on the head of the h22/h23 and the JDM f22 DOHC are the same. my gut wants to say yes but i'd wait for somone who knows more than i do to give you an answer.
I just bought a F22b DOHC and dropped it in my prelude and i used my H23a1 turbo manifold! USDM only offered 3 motors for the prelude H22a1/4, H23a1, and F22a1 however tho in JDM they offered a fourth motor the F22b engine specs are basicly the exact same as H23a1 jus higher redline i'm running a F22b with non stock internals at 17psi and the parts are all basicly the same. if you need any help with this honda stuff let me know i've done alot of honda motor swaps if you wanna know what swaps i've done let me know or anything else.