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 used to hear people say Silverstone tires got problem and always got pregnant syndrome. I didn't believe it and finally I got it and wasted the rest of 3 each (fairly new). I felt no point to keep something that...