Hondata or PFC, tuning depends on how much work is needed.
I rem from [ricer] that the y4 is a pain to get running properly. I think you need the y8 throttle body. You should PM him I believe he is selling that and you will need it to turbo your y4.

ALso his y4 made pretty good power at 6PSI.

PM Toda, i know [ricer] had previous problems with other tuners before toda fixed it.