well if i am not mistaken the f22b is a dohc non-vtec motor rated at about 160hp. this motor is viturally identical to the h23. there is said to be a sensor that is not on the f22b that is on the h23. this is simply drilled and tapped for the sensor so the motor can be used as a relatively inexpensive replacement for the prelude using the h23 engines. hope this helps