340 exhaust manifolds
My adapters are just 14 or 16 gauge plates with the inside shape matching the inside of the Magnum exhaust gasket, and the outside matching the 340 manifold. Then I sandwiched them between a Magnum gasket on the head side and a 340 gasket on the other side.
In my case, they have been a little problematic, too. I expect that at some point I will just spring for a set of Doug's headers and get rid of them. I had to re-gasket them once and the second time around they didn't seal well. Could have been something I did wrong, or could be they don't want to seal more than once.
I have pictures of them installed, but I don't think I have any after I got them cut on a plasma table here at work.
Here is a screenshot of the AutoCAD file I used to get them cut. Started with a scan of both gaskets and traced what I needed and merged them together.
My adapters are just 14 or 16 gauge plates with the inside shape matching the inside of the Magnum exhaust gasket, and the outside matching the 340 manifold. Then I sandwiched them between a Magnum gasket on the head side and a 340 gasket on the other side.
In my case, they have been a little problematic, too. I expect that at some point I will just spring for a set of Doug's headers and get rid of them. I had to re-gasket them once and the second time around they didn't seal well. Could have been something I did wrong, or could be they don't want to seal more than once.
I have pictures of them installed, but I don't think I have any after I got them cut on a plasma table here at work.
Here is a screenshot of the AutoCAD file I used to get them cut. Started with a scan of both gaskets and traced what I needed and merged them together.
