I dont know the exact plug and what it is called but between the map sensor plug and factory fuel filer housing is a 3/4 plug. a empty galley behind it. this blew out going down the freeway. so I had no boost, had to limp 40mph to lowes to get a 3/4 pipe thread plug. wrapped it in teflon this is a temp fix. called cummins to get the oem plug but the person I talked to seemed high on smelling glue. so does anyone have a part number by chance on this plug. with out this plug all your intake boost air goes out of this.