Update:
Actually the outer ring around the catalyst material is gasket, it's like ring type crush gasket...

TL"DR
Anyone know that bank 2 pre-cat have gasket or not?
Mine look like this when I remove it, nothing fall out or extra... Thanks




Full story:
Today I had remove both pre-cat to replace the leaking steering rack, but I'm sure that pre-cat has been removed by workshop before judging by the nut is not even hand-tighen at all. After remove it I didn't notice any metal gasket or wire gasket at the manifold to pre-cat mating surface, is this normal? Or maybe I just overlooking something? Thanks
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No gasket

 

Alright, thank you very much

 

It appears you are missing 20840-3Y110 and 20822-3Y100.

 

Clean the flange and use copper RTV.

There's definitely a gasket stuck around the cat material. Mesh crush gasket, iirc. Slather it all in RTV and reinstall.

 

jk I can't read

 

You guys must have different cars. I just installed a set for a customer 2 weeks ago. No gasket.

Rear cat does have a crush ring

 

Do you have a part number?

 

Negative ghostrider. I'm guilty of not looking at the photo closely. That would be the two part numbers you posted earlier.

 

Again. No gasket for bank 2 but there is a gasket on bank 1


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I think you are looking at a 3.5.

 

Lolol
yep. I'll check a Cali spec de-k tomorrow. Didn't even pay attention to the title. Just saw the pic and mind went right to 3.5


Called it. There is a ring on the Cali spec de-k.