So I was browsing the 370Z service manual right now and noticed in the the expanded view of the exhaust components, it list gaskets from where the header meets the cat. When I took my factory cats off, I don't recall any gaskets being there. I just put on the gaskets that Berk supplied and tightened everything up. Now I am second guessing myself, could I have double gasket it? Son of a b1tch...
Those who installed HFC's, please tell me there are no gaskets that go between the header and cat from the factory..
