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Motorcraft Spark Plug Set Focus ST / RS NGK Iridium Spark Plug Set LTR71X-II 0.028" Focus ST Ford Racing 2 Steps Colder Spark Plugs Focus ST/RS
OEM replacement One step colder 2 steps colder
Ford Racing Calibration with Spark Plugs Focus ST Ford Racing Calibration with Spark Plugs and Cold Air Intake Focus ST Ford Racing FR1 Power Upgrade Pack Focus ST
Includes tune and spark plugs Includes tune, spark plugs, and cold air intake Includes tune, spark plugs, cold air intake, and cat back