Intake Map Port Plug For Honda Acura RSX Integra Civic Si RBC RRC K20 K24 SeriesIntake Map Port Plug For Honda Acura RSX Integra Civic Si RBC RRC K 20 24 Series when making changes to your intake manifold or throttle body you will often have more than one map port. our billet plug is made of 6061 aluminum and uses an o ring to ensure proper seal. this is a must have for boosted vehicles as the extra pressure inside the manifold will often push out plugs that our not secured.