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Impreza WRX STI F4-2.5L DOHC Turbo
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Spark Plug
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Description and Operation
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).