Iridium plugs recommended to me by other MX5 Mk1 owners. A worthwhile upgrade. With these fitted pick-up is most definitely smoother and a reduction in the "stumble" on sudden throttle opening that these cars tend to suffer from sometimes. I like Denso plugs having used hundreds of them in many years I spent working in after sales in a Mazda dealership, never experienced any problems with them.
Verified purchase: Yes | Condition: New
These definitely improve engine efficiency and fuel economy. They also last longer than cheap plugs so don't need replacing as often which is an added benefit.
Verified purchase: Yes | Condition: New
Good plugs at a good price - an upgrade to my old NGK iridium plugs after 60K miles on my BMW X5 LPG.
Verified purchase: Yes | Condition: New
Excellent price and do the job
Verified purchase: Yes | Condition: New
Excellent plug.... Improved engine responsiveness, start up and torque...
Verified purchase: Yes | Condition: New
Current slide {CURRENT_SLIDE} of {TOTAL_SLIDES}- Best-selling in Spark Plugs
Current slide {CURRENT_SLIDE} of {TOTAL_SLIDES}- Save on Spark Plugs