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interchangable

  1. K

    Interchangable engine parts 821 to 939.

    Does anybody know whether the heads are the same on a 939 and 821? Can the ecu from 821 be used on 939 engine and just flashed or something? My motor just took a crap and would like to use the opportunity to upgrade the power if possible. I've contemplated just buying the engine and ecu and dash...