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Thread: Where to weld in O2 bung for SC'd car?

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    Idling - Listen to it purr...
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    Where to weld in O2 bung for SC'd car?

    Ok members help me out...
    Car--1999 NB JR supercharged
    Location-- Northern California
    Issue-P0421 code(precat)
    So I obviously have a common issue, but I want to take advantage if I can. I bought the 01+ exhaust manifold to swap. I'm not worried about the visual cause my supercharger in combo with the stock heat shield should cover it just fine. But I will have to weld a new bung for the front o2 sensor.
    So where do I relocate the front o2 sensor to that was in the precat?

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    Ninja Messiah kung fu jesus's Avatar
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    In the down pipe.

  3. The Following User Says Thank You to kung fu jesus For This Useful Post:

    tsingson (02-26-2016)

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    Ninja Messiah kung fu jesus's Avatar
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    http://mazdaroadster.net/showthread....tall-Not-Today!!!!

    For passing visual, either use a manifold blanket or wrap it. The years I spent in CA, I ran a JR header and a heat blanket. Although the header was CARB legal, the blanket covered it and an inspection tech never lifted it to check.

    It would be a good thing to have anyway, the SC will get hot enough without the exposed manifold directly under it.

  5. The Following 2 Users Say Thank You to kung fu jesus For This Useful Post:

    RotorNutFD3S (02-26-2016),tsingson (02-26-2016)

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