Gaskets required for catalytic converter replacement
 

My driver's side cat has been rattling for years now and it has annoyed me to the point of replacement. I have the new part and have started to soak the bolts in penetrating oil.


What I can't figure out is which gaskets I need.

I see these and it makes sense.
https://www.maperformance.com/produc...BoCaFUQAvD_BwE
https://cdn.shopify.com/s/files/1/08...g?v=1557345506
The infiniti parts catalog shows something different for exhaust manifold to converter gasket - it looks like a ring vs a flange type gasket (triangle above)
https://www.infinitipartscheap.com/i...ze/3846640.png

What's the right gasket? Is the ring one for OEM only? Car is an '09 XS sedan AWD.

Thanks,
Brian

Ring is for OEM only. The triangle gasket goes with aftermarket cats or test pipes.

Just an update on this. Ended up needing the small ring. Used a pacesetter OEM style catalytic converter from Rock Auto. Bought one at advance auto for $5,

Brian