Where is this from?

[models916]

https://www.ebay.com/itm/Factory-GM...&itm=122894675801&_trksid=p5713.c100041.m2061

 

[Dick MacKenzie]

Dirt track maybe. It’s only a few miles from me Mike. I can pick it up if you’re interested.

 

[409]

It's a marine manifold.

 

[Deadwolf]

Used on 83-90 GM school buss's. Some dirt trackers that love them for a specific class of racing.

 

[Don Jacks]

That makes more sense as boats don't use egr valves.

 

[models916]

Just wandering the EBay.