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 .
Anyone interested? Chris, Eva, myself and two others are go karting tomorrow morning at 11 am. I know that most of you are on your Eid trips, but who wants to join in? Send pm for location update.