Extra part that came with my car (1988) 2M4 converted to a 2.8L V6 by prior owner.
Another member clrified that it fits the 3100, 3400 and 3500 60 degree V6 motors. Casting number is 24508644. Appears to be unused. No pressed-in fittings.
Selling at $20 plus shipping from Spokane WA. USA Addresses only please.

[This message has been edited by MikesFirstFiero (edited 06-03-2020).]

That actually fits the 3100, 3400, and 3500 next gen series of 60 degree GM engines. The upper intake that it matches is shown below and fits their better-flowing heads. You might still find a buyer here to tinker with it but it won't fit the 2.8, 3.1, or 3.4.

[This message has been edited by Notorio (edited 06-01-2020).]

Thanks for the clarification about what it works with. it came with the car and I'll never use it so it goes bye-bye.