Iridium sparkplug

The primary purpose of a double iridium spark plug is to provide maximum longevity and consistent, high performance over an extended service life.

​This is achieved by using the precious metal Iridium, which has an extremely high melting point and is very durable, on both the center electrode and the ground electrode (or as an inlay on the ground electrode).

​Here are the key benefits and functions:

​1. Extended Service Life

• ​Maximum Durability: Iridium's superior hardness and resistance to heat and wear significantly slows down the erosion of both electrodes.
• ​Longer Intervals: Double iridium plugs can last up to four times longer than standard copper plugs, and often up to 80,000–120,000 miles in some applications, reducing the frequency and cost of replacements.

​2. Consistent, High Performance

• ​Efficient Spark: The fine-wire design of the iridium electrodes concentrates the electrical energy, allowing for a more focused, powerful, and consistent spark with less voltage.

• ​Improved Ignition: This leads to more complete fuel combustion, which can result in benefits like:
  • ​Better throttle response
  • ​Smoother idling
  • ​Fewer misfires

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​3. Reduced Voltage Requirement

• ​Better Conductivity: Iridium's excellent conductivity means a lower voltage is required from the ignition system to jump the gap and create a spark. This not only helps maintain a strong spark as the plug ages but also reduces stress on the ignition coil.

​In short, the "double" aspect means the high-wear iridium material is used on both firing surfaces, making the plug extremely robust and ideal for modern, high-performance, and high-heat engines that often require long service intervals.

​Would you like to know if double iridium plugs are right for your specific vehicle?