NGK Iridium Spark Plugs

NGK Iridium Spark Plugs (Price is for each plug)

90-05 MX5 Miata

  1.6 – 1.8 – 1.8 turbo – 1.8 Supercharged

We have found the NGK iridium to be the most consistent and longest lasting spark plug. It’s what we use in our street and race cars, including our endurance racers.

OEM heat range 6    NA6 (90-93)
OEM heat range 5    NA8, NB1, NB2, NB2 Turbo (94-05)

Recommendations:

Street and autocross use, normally aspirated – OEM heat range

Normally aspirated engines used for extended track use – Heat range 6

All forced induction engines used for autocross, track or increased boost over OEM – Heat Range 7