Some Moisture On Top Of The Y-pipe To The Exhaust

[busoptr]

So, this morning I started the car and was doing a routine check, saw a little bit of smoke coming from the Y-pipe of the exhaust, this Y pipe coming from the exhaust manifolds, and the top of the Y-pipe looked moist and smoke was coming from that moisture. Does anyone here know which part above this Y-pipe that could be leaking some kind of fluid and it falls on top of the Y-pipe and it smokes in the morning? Could it be the rear valve cover gasket leaking oil and it drops down on the Y-pipe? Or exhaust manifold gaskets? Or is it the Y-pipe itself? Anyone?