The NGK 90083 is the correct OEM one. I've used both before without issues, but the Iridium IX has a smaller gap (0.044" vs 0.055") than oem. I honestly couldn't tell a difference between them.
Rockauto has the 90083 for $8.82 each + shipping. So it may end up being cheaper than Amazon. Use the mazda3forums discount code '8507B9C3E039FF' in the 'How Did You Hear about Us' box to save 5%.
Rockauto has the 90083 for $8.82 each + shipping. So it may end up being cheaper than Amazon. Use the mazda3forums discount code '8507B9C3E039FF' in the 'How Did You Hear about Us' box to save 5%.
