Want to save your original, rare as hens teeth, beautiful R exhaust, after the rust demons have had their fun? Then read on. Nothing I have done myself and I can take no credit for any of this work. Just found it on the web. The photos show what a talented Japanese R enthusiast managed to achieve to overcome this issue. No words, photos tell it all I think.
This post shows the repairs done to the most common failure point. The next post shows repairs carried out on the next most common failure point further down the silencer.
Show us your repairs if you do something similar.