Thanks guys, it makes that sense that it is the oil breather vent pipe from the valve cover. Slick's first picture shows it running from where it plugs into the air inlet duct just upstream of the throttle body just to the left of the wiring bundle, heading towards the valve cover. That picture shows me which direction the damn thing came from, when it popped off while pulling the other end from the inlet duct - I had no idea which way it would head away from the inlet duct connection!