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 .
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While Malaysian cars are often modded, the Japanese has done it a long time ago, back 30-40 years ago (with style). The video from AOL explains about the modding process and the choices of vehicles they used to mod...