THE PORTAL HUB - Pinzgauers, Haflingers, Volvo 303s and more!

Has anyone opened one of these up? It looks to be just two straight tubes within the outer shell, mine looks pretty rough, has 'something" rattling around inside, and I believe, is the source of a small exhaust leak internally. I was thinking about taking it off,opening it up, having it repaired/welded, and refitting.
Any suggestions appreciated, and if by chance you have a serviceable one collecting dust in the garage,please let me know,thanks.

I didn't open mine up, but there are pics online where someone did. There should be an aluminum casting with fins that surrounds the 2 straight exhaust pipes to create the heat exchanging surface area. On the German forum there's some mention of that aluminum melting or failing at really high temps and long trips- hopefully that hasn't happened to yours.

Hopefully...
Thanks for the reply, I'll just have to see if someone has one hanging around they don't need.