The b16 head is better IF you plan on running a turbo because the head has better flow. BUT the b18c1 head is better if you plan on going all motor. gsr heads produce higher CP and are hondata compatible if you are using an obd1 computer. oh and you can rev to 8000rpm's with a b18a/b if you change the all of the bearings in the bottom end to gsr bearings!!! the bearing fit perfectly, no machining is required!!