eh well folks this thread is dead, but i just met in NH with a bunch of tuners, and they praised this idea after seeing the h23 on the dyno. It had 160 ft/lb at 3500 rpm, and it had pretty good tq numbers across the board. not sure if the h22 alsoo has this, but these guys seemed to be saying that it definitely had an advantage on the low end over the 22. Having a 70k h23, would a h22 head make sense? Id say id like to boost either way. To boost or not too boost is not the question, too swap heads and boost or just to boost is the question. I just dont want to hit a wall with the h23 that could have been avoided if i gave it higher revving capabilities with the h22.