I am bolting a G38 into my Pepsi Chipmunk and need to modify the stock muffler to have a dual stack reaching down through the cowl. I need to solder (weld?, braze?) a couple of pipes to the miffler but don't know what metal the muffler is made of.

Does anyone know what kind of soldering will do this?

I tried silver solder but it wouldn't take.

Any help would be appreciated.

Regards

Ari