I need to know about my exhaust gaskets. I went to advance auto, and they list one PN for my exhaust manifold gasket. I need the gasket that goes between the manifold and the y-pipe. Anyway, the reason I am confused is, they list the same PN for all the engines. Including the TPI, with dual cats. Is the manifold the same? The last time I ordered a manifold gasket, it was the wrong one. I had them order both ( the one for a Camaro listed 2 PNs, one was the same as the 'bird), and have to pick one up tommorrow morning at 7:30. What is the diameter of the flange, 2-1/2"?

 

There isn't any gasket between the manifold & y-pipe.

The head to manifold gaskets are the same between the models, even hough the manifolds themselves are different.