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2004 Nissan Titan

Question: do you think changing the manifold cats by cutting them out and welding in

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warrenroddy, Lewisville, TX, December 10, 2011, 12:26
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 Enthusiast

comparable with the same amount of precious metals will suffice versus not buying the whole assembly? there is no codes but pending 0420 catalyst below threshold bank 1 o2s are bouncing well what you guys think i am not trying to be cheap just efficent

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  • Answer #1

    euromech December 10, 2011, 12:45
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     Journeyman

    Do you want to remove the cats because that is illegal.

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    warrenroddy, December 10, 2011, 12:57
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     Enthusiast

    no i dont want to remove cat i want to just remove and replace the converter part not whole manifold

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    euromech, December 10, 2011, 13:31
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     Journeyman

    I undertand. You have to know that aftermarket universal converters wont last long.

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  • Medium-star Best Answer
    PARTS GUY December 10, 2011, 14:06
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     Master

    The reason why you have a P0420 code is because of the catalytic convertor is inefficient. The rear O2 sensor reading should not mirror the upstream O2. It should flat line after it has warmed up. Unfortunately Wakler Exhaust does not have an aftermarket listing for the cats.
    There's a way to try to clean the cats through a special chemical. It requires a professional shop to clean them. Contact me at jmgrhm30@gmail.com.

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