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Home >> Subaru >> 2005 >> Impreza WRX STI F4-2.5L DOHC Turbo >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Tune-up and Engine Performance Checks >> Spark Plug >> Description and Operation
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Spark Plug: Description and Operation

Spark Plug




The spark plug has a iridium tipped electrode. The thread diameter is 14 mm (0.551 in) and is controlled to a value between 0.7 and 0.8 mm (0.028 and 0.031 in).
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