Used intake manifold upper plenum.  This is a stock plenum, casting # 14081006. This is for factory TPI engines.  This is for 85-88 models that use the cold start injector system.  Please note that 85-88 plenums differ from 89, and 90-92 plenums and need to be matched to the throttle body and runners for proper operation.  Fits the following:

85-88 TPI Corvette
85-88 TPI Camaro
85-88 TPI Firebird/Trans Am

The item in the picture is the actual photo of the item being sold.