How Do I Find a Colder or Hotter Plug?
Each Manufacturer has Assigned a Unique Heat Range to Each Plug. How Can You Find a Plug that is a Hotter or Colder Heat Range?...
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Learning Center
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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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How Long Will My Iridium Spark Plugs Last?
Longevity varies on iridium plugs, dependant on the plugs features and application...
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What Are the Different Champion Resistor Types?
What is the difference between Champion "FISS", "Q", "R" and "X" resistor types?
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Why Do Some Spark Plugs Have Two Part Numbers?
Why do some spark plug brands have two sets of numbers?
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What Denso Iridium Plugs Are Available in the US?
Denso's Iridium TT, Iridium Power, Iridium Racing Series are available in the US, as well as Denso's Long-Life Iridium Plugs.
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What are Denso Twin-Tip (TT) Plugs?
Denso's Twin-Tip Technology literally features two "tips"...
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Wasted Spark Ignition Systems
Does a wasted spark ignition system require special spark plugs?
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