What Is It?

[frltsta11]

There's A Plastic Piece That Sits All The Way To The Rear On The Drivers Side Head. There Appears To Be A Vaccum Line Attached To It. Does Anyone Know What It Is And What It's For?

 

[c4c5specialist]

HI there,
If it goes into the top of the valve cover, it is the PCV vent hose.
Allthebest, c4c5