Box includes 4 plugs
I know you want to squeeze every last bit of HP out of your Spec Miata, I know we do! These are the best you can get from NGK, who manufactures the factory plug for Miatas. Designed specifically for the performance enthusiast, the Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling
Reviewed by: Dustin10/12/2012 07:48AM
Product ownership: Less than 1 yearNot purchased from: 5X Racing
As long as I've owned a vehicle, the spark plugs have been NGK. I will not settle for less. I've got the Iridium IX in my 91 Miata and along with the Magnecor KV-85 plug cables, I could tell a difference in the first time I fired it up and went for a drive. Smoother overall engine performance, definitely, especially under acceleration load.
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