Re: [Chevelle-list] Exhaust gaskets (Donuts) Help!

[Fleshead]

I am having a tough time keeping the donut gasket between the manifold and  
the exhaust pipe from disintegrating. After installation, it takes about 
3-4  months of very little driving and they start leaking again. 
I have been told that there are metal gaskets (poss copper?) and regular  
donut gaskets with a metal tube insert that helps the heat/exhaust flow 
through  with less stress to the donut.
 
I have not seen anything like what I am describing and wondered if there  
was someone out there that had some experience with this problem that they 
could  share.
 
Thanks,
Ed 
70 Chevelle SS Convertible