Learning Center

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  How Do I Find a Colder or Hotter Plug?

  Each spark plug has a unique heat range. How can you find a plug that is a hotter or colder heat range?...

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  Can I Use Platinum, Iridium or Ruthenium Plugs with Nitrous Injection?

  Iridium - yes. Platinum - no. Ruthenium - maybe...

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  I Have a Modified Engine - Do I Need a Colder Spark Plug?

  Possibly...

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  How Long Do Bosch Iridium Plugs Last?

  Bosch's iridium spark plug series brings OEM iridium long life plugs to the market...

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  Wasted Spark Ignition Systems

  Does a wasted spark ignition system require special spark plugs?

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