Aftermarket h23 intake manifold.....

cg6boi · Oct 4, 2007

i know this thread has been made a million times over, dont hate me im at werk and dont have time to search just wanna look later if anyone has responded......what duz it take to make the h23 mani fit and do they make aftermarket ones that will fit as well....i wanna build budget N/A motor lookin for 140 whp no much just want it

thejameshimself · Oct 4, 2007

the intake ports of the f23 are much narrower than those of the h manifold - so you'll have to get them widened out. also i think there's a problem with some water/oil/magicjellybean passage.

i'd just swap the whole h23 head. granted you won't have the all-mighty vtec, but you're motor will breathe much better esp on the high end.

thejameshimself · Oct 4, 2007

http://www.accordinglydone.com/forum/showthread.php?t=11176

there's a link of it on a f22. i can't imagine it being too terribly different

WhiteAccord · Oct 5, 2007

If your looking for 140whp... I/H/E and a VAFC tuned.

cg6boi · Oct 6, 2007

its an auto so im starting with 120whp

JMillerUA6 · Oct 6, 2007

cg6boi you should look into a port and polish and a h23 TB. That what I'm currently thinking about. I was quoted $600 for a mild pnp from a local shop. I too am thinking I'm gonna go NA.

The pnp might give you just about the same gains as the modified h23 IM