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o2 sensors

  1. o2 sensor plug locations

    Naturally Aspirated
    Hi guys and gals. Just purchased a 1998 DX HB d16y7. The guy i bought it off of installed a stock header from an ex due to the original header cracking he connected one 02 sensor and disconnected the other. My question is how do i determine which plug is for the primary and the secondary? i want...
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