Please help me. I recieved these headers from another car enthusiest, nd niether of us or anyone else i have talked to has been able to help me. So please take a look and let me know if u know something i dont.

They have 3 round holes (one above the two center primarys, one on each end) and 2 slotted holes (in between the outside primarys).

 

Possibly from a car with siamesed exhaust ports. Olds V8 comes to mind, but there are others. I suppose you are hunting for an engine so that you can use your headers. LOL

 

Is there any information stamped on them?

 

Did you never think that they are mounting holes to bolt the headers to the heads.