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 .
early this year i did started a thread on how to mod a stock vr4 engine to +-300whp with little budget, then i did the mod and manage to get 370whp but over budget....hehehe....now i'm...
this always happen when i leave the car in the hot day (lunch time). the needle just sticks to 0. after driving about 5 minutes, then it just working fine.. is this normal? using apexi EL..