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Iridium IX
Designed specifically for the performance enthusiast. Iridium IX® offers extreme ignitability, improved throttle response and superior anti fouling
  • Fine Iridium tip ensures high durability and a consistently stable spark
  • Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines
  • Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties
  • Tapered ground electrode minimizes quenching
  • Outstanding acceleration, high fuel efficiency and durability
  • Ultimate design, technology and performance.

Spark Plug Type Performance Differences



Correct Way to Check, Set, and Adjust Your Spark Plug Gap

Hex Size13/16"
Insulator HeightISO
Manufacturer Heat Range5
Additional Info5K Ohm
Seat TypeGasket
Reach19mm
Thread Diameter14 MM
Ground Electrode Tip DesignTaper Cut
Ground ConfigurationStandard
Ground Electrode Core MaterialNickel Core
Center Electrode Core MaterialCopper Core
Center Electrode Tip MaterialIridium
Gap Size0.032 in
Ground Electrode Quantity1
Alternate/OEM Part Number(s): 037118110, 0948200322, 1UN018110, 4728, 4875, 490010003, 581380003, 5813800030, 9079320024, 9079320116, 9079320167, 9807955844, 9900079K60P5R, 99906910X9026, 9993401691100, B240189900, BPR5EIX, BY480BPR5E, MZ602070

NGK Warranty Information:
Spark Plug Wires: Limited Lifetime; Ignition Coils: 3 Years / 36,000 Miles; All Other Parts: 60 Days