What you need to know? I had one in my hatch and its a beast.

Same head and block castings as the h22 were used....it has a longer stroke and flat top pistons(as opposed to the "dome" of the h22a) thats where it gets that extra .1 of a liter. Its a great motor, just don't rev the piss outta it b/c its powerband and bottom end were designed for the auto AWD tranny. If you decide you want 8k rpms all day, then stick with the h22a

Pretty much all the specs have been stated and yes, google is your bestest friend!!!