i just put a new sri on and on my stock intake tube there was the O2 sensor the tube from the vc to the intake tube and then there is a 2nd tube running to a T on another tube does anyone know what this tube is for?

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i think its for emissions or something i eliminated mine witha plug on the intake that came with the aem kit, and on the valve cover, i put one of those little filters.

 

thats not the tube im talkin abour i had two on my stock intake one from the vc to the intake what your talking about and another one after i put on my sri i left that off and it was sucking air so i put a breather on that and i still have the tube from the intake to the vc.