02-04-2022, 08:58 AM
I realise you're in the USA Sneezer, however here in the UK 'The Green Spark Plug Company Ltd' is a reputable supplier of spark plugs - here's their 18mm NGK AB-6. As others have said, if you're buying locally or online watch out for fake NGK plugs there's an awful lot of them about.
https://www.gsparkplug.com/1x-ngk-copper...gJ5T_D_BwE
https://www.gsparkplug.com/1x-ngk-copper...gJ5T_D_BwE