What are the disadvantages of spark plug?

List of the Disadvantages of Iridium Spark Plugs

  • The cost of iridium spark plugs is their primary disadvantage.
  • You may not see an improvement in performance.
  • Different layering techniques can create subpar results.
  • Some coatings can be brittle.
  • Dust from iridium spark plugs offers a higher risk of flammability.
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    How can you tell if iridium IX spark plugs are fake? (video)

    https://www.youtube.com/watch?v=7fyD1BXnhtY

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