NGK laser iridiums are the ones I just put in. You don't have to do it often so the price tag doesn't hurt as much I guess is one way of looking at it. Also buying good plugs will help you NOT spend a ton more money further down the road on repairs.
Just installed NGK 92274 in a 2021 Mazda 3. They are 'Ruthenium' instead of iridium, seems to be their newest plug available. Just don't touch the gap, it was perfect at .044. Runs great.
I just did the change myself on my Gen 1 Mazda 3. It's simple! I used NGK Laser Iridiums.
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