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NGK Iridium IX Spark Plugs

Ignition - NGK Iridium IX Spark Plugs
Ignition - NGK Iridium IX Spark Plugs

Sold as a set of 4. 

Iridium IX Spark plugs are the most technologically advanced high performance plugs available. Featuring a 0.6 mm iridium center electrode tip, they offer superior ignitability without sacrificing duality. The tapered ground electrode increases flame kernel expansion, while the superior heat range design is ideally suited to the demands of the high performance environments. Specially designed to meet the needs of serious enthusiasts, Iridium IX Spark Plugs offer outstanding acceleration, high fuel efficiency, and long life. When you demand the most from your engine, rely on the proven performance of NGK Iridium IX Spark Plugs. Iridium IX Spark Plugs are the most technologically advanced high performance plugs available.

Iridium plugs burn clean and a cooler range of plug can be used without the normally associated risk of plug fouling. This is why we recommend them over the Autolites for the boosted Ecotec. 

  • Choose stock heat range for cars with stock pulleys down to 3.2".
  • Choose one range colder for 3.0" pulley use. 
  • Choose two ranges colder for 2.8" and below pulley sizes. 
  • .033 gap. 

Iridium plugs have a very delicate tip, make sure you use a proper gapping tool (one that doesn't apply pressure to the tip) to change the gap or you could break off the tip. 

Ignition - NGK Iridium IX Spark Plugs
Ignition - NGK Iridium IX Spark Plugs
Customer Reviews
4.9 Based on 50 Reviews
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Filter Reviews:
LK
04/08/2021
Lawrence K.
United States
ZZP good for me.

ZZP offers great products at fair prices. Very happy with customer service also.

RF
03/26/2021
Rick F.
United States United States
Great spark plugs!

I can't believe the difference between the NGK iridium spark plugs and the stock plugs that came with my Sonic. My car's running much better than before and my gas mileage is better than ever.

KT
03/20/2021
Kendrick T.
United States United States
Awesome

Excellent. I loved the transition and the shipping process. Gonna be purchasing more from here in the near future.

AT
03/14/2021
Austin T.
United States United States
World of difference

Car runs better than ever! Got these and the coil pack and the car feels totally different. Smoother idle and feels more refined

NH
02/13/2021
Nathan H.
United States United States
Great spark plugs

Great product and it was shipped the day I ordered, received them within days of order.