Outlet: 2.5" OD. Condition: New. The item page will indicate which service is used for that specific item.
FLO-PRO Header Collector Kit w/ Gaskets - Reducer - 3.5" Collector to 3" Outlet
Flowmaster 15925, Ball Flange Header Collector Kit 3In To 2.5 Performance Parts
Flowmaster 15930FM, Ball Flange Header Collector Kit 3.0 To 3.0 Performance Part
Header Collector Exhaust Reducer - 2.5" Collector to 2.5" Outlet - AWHC212