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E and J are both black top - but kouki and chuki are NOT interchangeable for ECU - as for the s14 - go by the ECU code -
post 96 blacktops use s14 sensors... ??? at least they arent the same as the pre96 ones... and if u change the o2 - a redtop pfc should work (but y do that i have no idea just buy the 94-96 blacktop one) (btw i alluded(also SP?) that the harness/ecu would determine it not the block/engine)
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