This ad is for an OEM new GM Product Turbocharge Outlet Pipe Exhaust Adapter as shown in the pictures.
GM Part number; 12638304
This item has never been installed or used in any way. Since I received them in a GM Master Case, there you be no individual packaging for it. That is the only reason what I listed it under New Other and not under New. In addition, it might have some minor surface cosmetic blemish or two from storage and handling.