my friend has a 91si hatch with a d16y7 engine in it and im wanting a run a y8 manifold on there for him, but the only catch is the si manifold has this weird sensor on the drivers side of the manifold. what is this sensor? do i need it? i noticed its not on a 88 si. any help would be appreciated. i tried searching for this sensor on here but am unable to come up with anything
thanks
thanks