usually you need an fmu to go with an apexi safc. so i would first buy the fmu, and if you want better tuning, invest in a safc.
but just looking at your plans, i wouldn't set your goal boost that high. the b16 has fairly high compression and doesn't take high boost levels like that very well without great tuning with a hondata. so i would either suggest lowering your goal boost or getting a hondata.
but just looking at your plans, i wouldn't set your goal boost that high. the b16 has fairly high compression and doesn't take high boost levels like that very well without great tuning with a hondata. so i would either suggest lowering your goal boost or getting a hondata.