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iridium plugs

  1. pelotonracer2

    Fiesta ST Spark plug tech

    Not sure if, when or where this has been covered on this forum but here's a little information about the plugs used in our FiSTs. Fords Part # 12405 cross references to BOTH the Ford Focus ST and Fiesta ST, however, Ford uses a sublet number (i.e. SP-525, SP-532 ect) for internal tracking (but...


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