Is there a substitute for the NLA donut exhaust gasket? I haven’t asked a muffler shop but sure can’t seem to locate one online. Atkins said they had a few, nope.

 

yes i would check a muffler shop. if u have the old one to take along, i'm sure they could find one the would work.

 

Where does this go exactly.. I'm sure this is the ****** causing my exhaust leaks

 

I’ll have to look at my exhaust (it’s in pieces) and see.. mine was missing altogether

 

Round gaskets used in only 2 places that I can see:
1) fits into where the main exh pipe connects to rear muffler.
2) where 2ndary small pipe (runs parallel to pipe to the muffler) ties in with the muffler mini-pipe on stock muffler.
If its a noise/leak you are hearing I don't think there is much airflow on the mini pipe (its not even muffled), so presume that leak would be a the muffler/pipe joint...
Stu A
80GS

 

What are the dimensions of that gasket?

Looks similar to the exhaust flange gasket my brother had on his '62 Vette. It was the ring gasket were the exhaust pipe mated to the manifold. Those gaskets always used to blow out.

If you go to the Rockauto website and search under 60-70 Chevy for exhaust flange gasket, than you might be able to find a suitable size.