Can I use NGK Copper Plugs in a NA S2K?
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Can I use NGK Copper Plugs in a NA S2K?
Hey guys, does anyone know if it would be ok to use NGK #9's (two steps colder then stock) copper plugs that I use to use when my car was turbo, now that I am NA again? I have another two new sets and I wanted to know if I could use them or if I had to order stock iridium plugs again. Any info would be appreciated. I'm just wondering if there would be any negative effects from using these copper plugs. Thanks.
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