Anyone know the inner diameter of the Pacesetter Header piping?

I was at Napa today and wanted to purchase a donut gasket. Same type used on several GM and Honda OEM pipes at the spring compression fitting.

They needed to know the inner diameter of the piping to get me the correct fit and I did not know. They have approx 10 different diameter and depth gaskets available for the OEM fitting that is very similiar to the Pacesetter header compression fitting.

I am easily annoyed by the pitterpatpatpitter that is coming from that compression and have already tighten it all the way down. The leak isn't bad, but I figure the gasket will seal it much better and I won't have to deal with the pitterpatpatpitter sounds.

EDITED: I am second guessing the 2" diameter now.

NEVERMIND!

Aren't search engines a wonderful thing. :p

Just so happens someone else asked the same exact thing a while ago here.

2" ID on the piping for a Pacesetter header.:D

Could someone verify if the piping at the spring compression fitting that connects to the cat is a 2" inner diameter or larger?

Thanks!