USMCSHO341
New member
So I am just curious what the difference would be with gapping my factory spark plugs @ .30 versus buying aftermarket ngk replacements @ $7.50+ a piece. Is it really worth the swap? Do the ngk plugs come pre gapped if so what are they gapped at when I purchase them. And what are the downsides of gapping my factory plugs if any? Thanks for any help.
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