Does anyone know the size of each gaskets comes with the Nismo exhaust?
Also will the stock O ring fit on the Nismo?

 

I know this is dead, but I just installed the nismo exhaust on my car. Ok, the gaskets connecting from the cats to the y-pipe are 2.5 in on the nismo, as opposed to ~2.25in on the stock, and the y-pipe to mid-pipe connection is 3.0in Nismo versus 2.5 Stock.
I went searching for gaskets all day long that would fit since i got the exhaust used and the guy didnt have the gaskets! I sort of jimmy-rigged it, and Im trying to get the Real nismo gaskets. went to Nissan, any they couldnt order it. If anyone knows how I may get them, please help!
Thank you

 

Here you go.

https://my350z.com/forum/intake-exhaust/316008-nismo-exhaust-gaskets.html