NGK Iridium IX Spark Plugs

NGK spark plugs and DENSO spark plugs, plus those from Autolite, Bosch, and Champion, help maximize engine power and operating performance ride after ride. We carry thousands of spark plugs for everything from Chevy to Ford, Volkswagen to Toyota, all with a 100% fitment guarantee. Browse popular spark plugs including NGK Iridium, NGK Racing, NGK G-Power, and many more replacement spark plugs. Our top-grade Spark Plugs are the key to igniting your ride. Ensure they’re well protected in the Cylinder Head and properly connected via the Coil Boots when replacing them.

NGK spark plugs and DENSO spark plugs, plus those from Autolite, Bosch, and Champion, help maximize engine power and operating performance ride after ride. We carry thousands of spark plugs for everything from Chevy to Ford, Volkswagen to Toyota, all with a 100% fitment guarantee. Browse popular spark plugs including NGK Iridium, NGK Racing, NGK G-Power, and many more replacement spark plugs. Ensure they’re well protected in the Cylinder Head and properly connected via the Coil Boots when replacing them.

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  1. NGK Iridium IX
    NGK Iridium IX 2667 BKR7EIX Spark Plug
    Special Price $7.80 Regular Price $10.99
  2. NGK Iridium IX
    NGK Iridium IX 3521 CR9EIX Spark Plug
    Special Price $7.94 Regular Price $10.99
  3. NGK Iridium IX
    NGK Iridium IX 2309 LFR7AIX Spark Plug
    Special Price $8.17 Regular Price $11.99
  4. NGK Iridium IX
    NGK Iridium IX 5944 BPR7HIX Spark Plug
    Special Price $7.84 Regular Price $10.99
  5. NGK Iridium IX
    NGK Iridium IX 4919 BCPR6EIX-11 Spark Plug
    Special Price $7.80 Regular Price $10.99
  6. NGK Iridium IX
    16 pc NGK Iridium IX Spark Plugs for 2011-2021 Ram 1500 5.7L V8
    Rating:
    98%
    Special Price $129.27 Regular Price $184.99
  7. NGK Iridium IX
    NGK Iridium IX 6509 LTR6IX-11 Spark Plug
    Rating:
    100%
    Special Price $8.12 Regular Price $11.99
  8. NGK Iridium IX
    NGK Iridium IX 4469 LFR5AIX-11 Spark Plug
    Special Price $7.84 Regular Price $10.99
  9. NGK Iridium IX
    NGK Iridium IX 2669 BKR9EIX Spark Plug
    Special Price $7.80 Regular Price $10.99
  10. NGK Iridium IX
    NGK Iridium IX 5464 BKR5EIX-11 Spark Plug
    Rating:
    100%
    Special Price $8.12 Regular Price $11.99
  11. NGK Iridium IX
    NGK Iridium IX 6853 BPR9EIX Spark Plug
    Special Price $8.22 Regular Price $11.99
  12. NGK Iridium IX
    NGK Iridium IX 3690 TR7IX Spark Plug
    Rating:
    100%
    Special Price $7.71 Regular Price $10.99
  13. NGK Iridium IX
    NGK Iridium IX 5044 BR8EIX Spark Plug
    Special Price $7.89 Regular Price $10.99
  14. NGK Iridium IX
    6 pc NGK Iridium IX Spark Plugs for 2003-2006 Nissan 350Z 3.5L V6
    Rating:
    100%
    Special Price $51.48 Regular Price $73.99
  15. NGK Iridium IX
    NGK Iridium IX 4055 BPR7EIX Spark Plug
    Special Price $8.22 Regular Price $11.99
  16. NGK Iridium IX
    NGK Iridium IX 6441 ZFR6FIX-11 Spark Plug
    Rating:
    100%
    Special Price $7.80 Regular Price $10.99
  17. NGK Spark Plug
    NGK Iridium IX 91187 LKAR6AIX-11 Spark Plug
    Special Price $7.84 Regular Price $7.87
  18. NGK Iridium IX
    NGK Iridium IX 6637 BPR6EIX Spark Plug
    Special Price $7.89 Regular Price $10.99
  19. NGK Iridium IX
    NGK Iridium IX 6418 BKR6EIX Spark Plug
    Rating:
    100%
    Special Price $7.80 Regular Price $10.99
  20. NGK Iridium IX
    NGK Iridium IX 3764 BKR6EIX-11 Spark Plug
    Special Price $7.80 Regular Price $10.99
  21. NGK Iridium IX
    NGK Iridium IX 7067 BR7HIX Spark Plug
    Special Price $8.17 Regular Price $11.99
  22. NGK Iridium IX
    NGK Iridium IX 2668 BKR8EIX Spark Plug
    Special Price $7.80 Regular Price $10.99
  23. NGK Iridium IX
    NGK Iridium IX 6482 CR10EIX Spark Plug
    Special Price $7.94 Regular Price $10.99
  24. NGK Iridium IX
    NGK Iridium IX 7803 DPR7EIX-9 Spark Plug
    Special Price $8.03 Regular Price $10.99
  25. NGK Iridium IX
    NGK Iridium IX 3981 BR9EIX Spark Plug
    Special Price $8.22 Regular Price $11.99
  26. NGK Iridium IX
    NGK Iridium IX 2707 BR9ECMIX Spark Plug
    Special Price $13.22 Regular Price $18.99
  27. NGK Iridium IX
    16 pc NGK Iridium IX Spark Plugs for 2009-2020 Dodge Challenger 5.7L V8
    Rating:
    100%
    Special Price $129.27 Regular Price $184.99
  28. NGK Iridium IX
    NGK Iridium IX 4344 LTR5IX-11 Spark Plug
    Rating:
    80%
    Special Price $7.80 Regular Price $10.99
  29. NGK Iridium IX
    8 pc NGK Iridium IX 6509 LTR6IX-11 Spark Plugs
    Special Price $60.05 Regular Price $85.99
  30. NGK Iridium IX
    NGK Iridium IX 4218 CR8EIX Spark Plug
    Special Price $7.94 Regular Price $10.99
  31. NGK Iridium IX
    NGK Iridium IX 3006 BR10ECMIX Spark Plug
    Special Price $13.22 Regular Price $18.99
  32. NGK Iridium IX
    8 pc NGK Iridium IX 3690 TR7IX Spark Plugs
    Rating:
    100%
    Special Price $60.73 Regular Price $86.99
  33. NGK Iridium IX
    NGK Iridium IX 2318 BR6FIX Spark Plug
    Special Price $7.66 Regular Price $10.99
  34. NGK Iridium IX
    NGK Iridium IX 3689 TR6IX Spark Plug
    Special Price $7.71 Regular Price $10.99
  35. NGK Iridium IX
    NGK Iridium IX 3797 CR8EHIX-9 Spark Plug
    Special Price $7.94 Regular Price $10.99
  36. NGK Iridium IX
    NGK Iridium IX 7516 YR5IX Spark Plug
    Special Price $7.99 Regular Price $10.99
  37. NGK Iridium IX
    NGK Iridium IX 7554 ZNAR7AIX Spark Plug
    Special Price $7.99 Regular Price $10.99
  38. NGK Iridium IX
    NGK Iridium IX 2313 LZTR4AIX-11 Spark Plug
    Special Price $8.17 Regular Price $11.99
  39. NGK Iridium IX
    NGK Iridium IX 7001 BR8HIX Spark Plug
    Special Price $8.17 Regular Price $11.99
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Whether you are looking for a long-lasting performance spark plug, or one for everyday use, Sixity has the NGK, DENSO, and Champion spark plugs you need, at prices you will not find anywhere else.

Spark Plug Features

  • Precision ceramic insulators
  • Corrosion-resistant shell with triple high pressure gas seals
  • Screw or snap-on electrical connectors
  • Pre-installed metal compression gaskets
  • Copper-core electrode cooling
  • Application specific heat-range design
  • Improved cold-starting performance
  • Smooth firing at high or low engine RPM
  • Reduced electrode erosion and long service life
  • Enhanced ignition efficiency and fuel economy
  • Superior anti-fouling characteristics
  • Reduced hot-spark firing voltage requirements
  • Maximum engine horsepower and torque
  • Superior throttle-response, acceleration and WOT performance
  • Precision Laser-welded Iridium electrodes - 6X harder than platinum
  • Precision ceramic insulators
  • Corrosion-resistant shell with triple high pressure gas seals
  • Screw or snap-on electrical connectors
  • Pre-installed metal compression gaskets
  • Copper-core electrode cooling
  • Application specific heat-range design
  • Improved cold-starting performance
  • Smooth firing at high or low engine RPM
  • Reduced electrode erosion and long service life
  • Enhanced ignition efficiency and fuel economy
  • Superior anti-fouling characteristics
  • Reduced hot-spark firing voltage requirements
  • Maximum engine horsepower and torque
  • Superior throttle-response, acceleration and WOT performance
  • Precision Laser-welded Iridium electrodes - 6X harder than platinum
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