Does anybody have custom made Headers for 1964 Olds Jetstar1 394 cu.in.?

 

You might try Headers By Ed.

 

There have been quite a few folks asking about headers for the older generation Oldsmobile engines. Unfortunately, headers for your application will have to be custom. You might do a search on "headers and 394." I know Joe P had a few suggestions for another member with a similar question.

 

I'll even make it easy:

https://classicoldsmobile.com/forums...ers-394-a.html