This is the hvac air duct for the left dash outlet on 1986-1989 Chevrolet Corvette C4 vehicles. This is a used, factory OEM, genuine GM part, in good condition. This does have a couple cracks on the outlet end (shown in the pics). You could probably use some duct tape around this area to build it back up.

GM part # 14081368

Item is number 31 in the GM diagram.