3.7 LITER. PartQualifier: upper. upper. Vent hose connector. Evaporative Emissions System Line Adapter. Tubular elbow for the flow of crankcase gases back into the intake manifold. and Amplifier; Assembly. Coupling. Evaporative Emissions System Line Adapter. Valve Elbow. Included with: PCV Tube, Vent Hose, Vent Tube.