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IRIDIUM POWER
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0.4 mm dia. Iridium, only at DENSO!
Using 0.4 mm dia. iridium center electrode, IRIDIUM RACING displays superb ignitability and low required voltage, drawing out better performance from your car - increased acceleration, accelerator response, operational stability, and lower fuel consumption. On the circuit, the sharp acceleration and rapid accelerator response will help you win, while on city streets, it will realize a comfortable and long drive in addition to low fuel consumption.
  Specification Includes Terminal
Included with the plug comes with a terminal nut compatible to the Nology Hot Wire and most plug cords around the world. Please remove for vehicle types that do not require terminals. ( Some plugs have solid terminal. Please refer to the list. )

  Built-in, Highly Reliable Resister
All IRIDIUM RACING plugs specify a resistor, and contain a highly reliable monolithic-type resistor that blocks noise that may affect electronic devices. (IW06 has no resistor.)

  Highly Corrosion Resistant, Burnished Nickel Plating
Burnished nickel plating on the housing, a high level of corrosion resistance has been realized. Also, because the amount on the threads is low, the damage to the female thread in the cylinder is reduced.

  Insulators for Racing
  By using a new, strengthened insulator which was developed during numerous and repeated testing during racing trials, strength is improved by 20%.

  All-Platinum Ground Electrode
  Compared to the nickel alloy used in conventional spark plugs, the high melting point of platinum will reduce such problems as ground electrode melting and wear. Also, the 0.8mm platinum alloy is welded on and gapped without any bending, reducing residual stress and increasing durability.

  0.4 mm Diameter. Iridium Center Electrode
The center electrode tip is able to be made fine using a new iridium alloy with a high melting point. The required voltage is reduced, and ignitability is improved greatly. This new iridium alloy's material composition, manufacturing method * 1, and welding method * 2 have been patented.

* 1 The addition of rhodium to improve high temperature oxidation resistance:
Japan Patent 2877035, UK Patent 2302367, People's Republic of China Patent 961022841, Republic of Korea Patent 0292083, U.S.A. Patent 6094000/6262522

* 2 Using a melting method instead of the conventional sintering method.
Japan Patent 3000955, U.S.A. Patent 5977695

  Spark Cleaning Pocket
 
Between the center electrode and the insulator, a small pocket has been opened around the tip clearance. When there is carbon fouling or deposition, this part will discharge and burn off the carbon, restoring electrical resistance. This technology is patented by DENSO (Japan Patent No. 2727558)

  Silicone Oil Coating
  During the start of the race, non-starting from carbon fouling and carbon deposits can be fatal. To stop this, the insulator has been coated with a silicone coating. Using the water repellency of silicone, the insulator surface is isolated from moisture and carbon, preventing a decrease in resistance.

  Housing End Face Chamfer
  To improve the tolerance to abnormal combustion conditions, the housing end face chamfer has been enlarged. Be covered for slight inaccuracies in tuning. Also, because the exhaust of residual gas and the flow of new gas have been facilitated, its self-cleaning performance has been improved, making this a carbon fouling resistant design.

  360° Laser Welding
  The process used to join the iridium tip is a highly reliable "All-around Laser Welding * 1" process that is able to withstand various kinds of driving conditions.

* 1 This "360゜ Laser Welding" method has been patented in the U.S.A. and Japan (Japan Patent No.: 2921524, U.S.A. Patent No.: 6078129)


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