1990 Exhaust Manifold Passenger Side Flange???

[Blue Flame Restorations]

Originally Posted by dscott

Brett,
It seems like you are missing part of the exhaust manifold. The two should mate up together with a gasket between them. The gasket part # is 10147973 from GM. I'm not sure if this is still available. If it not I have a couple available.
Hope this helps, Dennis

Thanks Dennis. Lee, the driver's side has a ball flange but the passenger side exhaust pipe just has the triangular flange. I can see on the flange where a gasket has been. It looks like a I need a sleeve with a flange welded to it to go onto the CAT. The sleeve would attach with a clamp.

Does anyone know if this is how the stock setup is?