The port circled in RED is for the Purge Control Solenoid Valve. This is an emissions sensor used on the Acura RSX chassis. Insert a plug & retaining ring into this port if you are not using this sensor.

The port circled in ORANGE is for the MAP sensor. Install the MAP sensor into this port if you are using the PRB/PRC style intake manifold.

If you are using your HR throttle body on an intake manifold that has the MAP sensor located on the OE intake manifold (RRC/RBC) install the sensor in the factory location and install the supplied plug into the port circled in ORANGE.

Insert the plug with the threaded hole facing up. If you do not, you will not be able to remove them without damaging the part.

Use the retaining rings to keep the plugs in place. Failure to do this can result in lost parts and vacuum leaks.