they will fit in to b16a ,
The manifold are one piece type , from the top header mount to the catalys adapter ,
if this o2 sensor wont fit to your plug , you could use your stock o2 sensor .
I just bought my FD3S about a month ago. It comes with a Blitz Access Ecu, the same as in the blitz/scorch drag rx7. I heard that the ecu is chipped (remapped?) in japan prior to ordering. U need to inform the...