3.5 LITER. SEDAN. Barometric Pressure Sensor. Incl.O-Ring. Manifold Differential Pressure Sensor. Optional. Supercharger Air Inlet Pressure Sensor. The Manifold absolute Pressure Sensor provides instantaneous Manifold Pressure information to The engine's electronic control unit (ECU). Assembly - Map. Barometric. Ignition Module. Manifold Absolute. Manifold Differential. Included with: Cover Assembly.