Anyone run high-flow Cats to reduce hydrocarbon exhaust smell?

jbc426 said

Nope, I smell no unburned fuel in my exhaust anymore.

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Then the cats are somehow removing the excess fuel, but unfortunately that does not mean your AFR reading is correct as explained.

I would be concerned that these are not going to last. That is the common outcome of fuel rich exhaust into a cat. They are not intended to remove excess fuel but to convert excess CO to CO2.
This has all been said before in this thread.