Spectre Universal Adapter Intake Manifold / Vent Port & Vacuum Sensor Adapter 3in. - ChromeSpectre's 3 inch outside diameter universal vent port and vacuum sensor adapter is manufactured from durable co polymer ABS resin that can help insulate the intake tract from heat. Universal design includes 3 vacuum vent fittings and port openings for multiple configurations. The grommets holes in the tube come pre plugged so you only use the ports you need. Combine with other 3 inch tubing to create an intake for almost any application.