it requires EXTENSIVE modifications to bolt it on... it doesnt even mate up to the H22A1-4 heads without trimming and plugging the mounting flange.

it's designed to mate up only to the H22A7.

once you get it to mount leak free, then you can figure out how to adapt your current IAC valve to the new manifold.

the details are in www.preludeonline.com and you'll need to buy a membership if u dont already have one to view the mod list to make it fit.