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Denso 3501 Spark Plug
I've been Googling my ass off for two hours but can't find any good info on the Denso 3501 Spark Plugs. They are supposedly an Iridium direct replacement for our oem plugs, yet when I compare I noted that the oem are 14mm and the Denso's are 16mm.
Will a thin wall 16mm socket even fit? It's pretty tight even with the oem 12 point plugs...
Has anyone installed these?
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