Where does the two vacumm lines go? I know one goes to the manifold (the Lager one) Where does the small nipple go. Does it go to atmosphere? Please help.

Thanks

 

One line goes to the the UIM as you know. The other nipple is for the popoff function of the valve. You do not need to cover that one. I think the nipple is there so that people can reroute a vacuum hose back into the intake box or something kinda like how the stock bov is hooked in to the stock air box. I doubt anyone tries it with such a small hose though. I've never seen anything done with it, but you will be fine with it left open.