Bosch Iridium Spark Plug 9664
  • Thumbnail  Bosch Iridium Spark Plug 9664
  • Thumbnail  Bosch Iridium Spark Plug 9664
  • Thumbnail  Bosch Iridium Spark Plug 9664

Bosch Iridium Spark Plug 9664

Part # 9664
SKU # 417843
Notes: Double iridium. Do not gap. Gap is not adjustable.

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Part #9664
SKU #417843
NotesDouble iridium, Do not gap. Gap is not adjustable.
Ground Electrode DesignTapered
Gap - Factory Preset1
Ground Electrode ConfigurationStandard
Ground Electrode MaterialCopper
Resistance (Ω)6000
Seat TypeFlat
Heat Range8
Reach (in)19
Center Electrode Tip MaterialIridium
Thread Size14
Hex Size16


Bosch OE Fine Wire Double Iridium. All iridium plugs are NOT created equal. Give your customers the only one engineered for both high performance and long life. The ultra fine wire design and laser welded, tapered ground electrode deliver the ultimate in ignitability and high performance. The iridium-alloy center electrode firing pin and laser welded ground electrode with iridium alloy inlay help it to go the distance.

  • checkmarkDouble Iridium electrodes ? iridium firing pin and iridium ground electrode inlay offer higher performance and 4 times longer life compared to standard copper spark plugs
  • checkmarkOE Fine Wire design requires up to 24% less voltage to ignite
  • checkmark360 degree continuous laser welding increases durability for increased life
  • checkmarkCopper core provides broader heat range to resist pre-ignition and fouling
  • checkmarkPre-gapped and nickel plated threads allow for quick installation without adjusting the gap or applying anti-seize
  • checkmarkTapered ground electrode allows for better ignition throughout the life of the spark plug
  • checkmark7 year customer satisfaction guarantee (visit for details)
  • checkmark1 year Technician Warranty (visit for details)