View Full Version : Spark plug gap?
What is the stock gap for spark plugs or which ever works best for daily driving? I am guessing its around .030-.040? So spark plugs with 2 or more of those prong things are non adjustable right?
ouch1011
06-15-2010, 01:30 AM
I believe it is .041-.044". .030" is too narrow unless you are boosted. (or running points)
mike-tracy
06-15-2010, 02:26 AM
My owners manual (98 Outback, but covers both ej22 & 25's) specifies a range from .039-.043 without differentiating between engines.
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